CustomAttribute.cs source code in C# .NET

Source code for the .NET framework in C#

                        

Code:

/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / BCL / System / Reflection / CustomAttribute.cs / 1305376 / CustomAttribute.cs

                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
// [....]
// 
 
using System;
using System.Runtime.CompilerServices; 
using System.Runtime.InteropServices;
using System.Collections;
using System.Collections.Generic;
using System.Resources; 
using System.Diagnostics;
using System.Globalization; 
using System.Security; 
using System.Security.Permissions;
using System.Runtime.ConstrainedExecution; 
using System.Runtime.Versioning;
using System.Diagnostics.Contracts;

namespace System.Reflection 
{
    [Serializable] 
    [System.Runtime.InteropServices.ComVisible(true)] 
    public class CustomAttributeData
    { 
        #region Public Static Members
        [System.Security.SecuritySafeCritical]  // auto-generated
        public static IList GetCustomAttributes(MemberInfo target)
        { 
            if (target == null)
                throw new ArgumentNullException("target"); 
 
            return target.GetCustomAttributesData();
        } 

        [System.Security.SecuritySafeCritical]  // auto-generated
        public static IList GetCustomAttributes(Module target)
        { 
            if (target == null)
                throw new ArgumentNullException("target"); 
            Contract.EndContractBlock(); 

            return target.GetCustomAttributesData(); 
        }

        [System.Security.SecuritySafeCritical]  // auto-generated
        public static IList GetCustomAttributes(Assembly target) 
        {
            if (target == null) 
                throw new ArgumentNullException("target"); 
            Contract.EndContractBlock();
 
            return target.GetCustomAttributesData();
        }

        [System.Security.SecuritySafeCritical]  // auto-generated 
        public static IList GetCustomAttributes(ParameterInfo target)
        { 
            if (target == null) 
                throw new ArgumentNullException("target");
            Contract.EndContractBlock(); 

            return target.GetCustomAttributesData();
        }
        #endregion 

        #region Internal Static Members 
        [System.Security.SecuritySafeCritical]  // auto-generated 
        internal static IList GetCustomAttributesInternal(RuntimeType target)
        { 
            Contract.Assert(target != null);

            IList cad = GetCustomAttributes(target.GetRuntimeModule(), target.MetadataToken);
 
            int pcaCount = 0;
            Attribute[] a = PseudoCustomAttribute.GetCustomAttributes((RuntimeType)target, typeof(object) as RuntimeType, true, out pcaCount); 
 
            if (pcaCount == 0)
                return cad; 

            CustomAttributeData[] pca = new CustomAttributeData[cad.Count + pcaCount];
            cad.CopyTo(pca, pcaCount);
            for (int i = 0; i < pcaCount; i++) 
            {
                pca[i] = new CustomAttributeData(a[i]); 
            } 

            return Array.AsReadOnly(pca); 
        }

        [System.Security.SecuritySafeCritical]  // auto-generated
        internal static IList GetCustomAttributesInternal(RuntimeFieldInfo target) 
        {
            Contract.Assert(target != null); 
 
            IList cad = GetCustomAttributes(target.GetRuntimeModule(), target.MetadataToken);
 
            int pcaCount = 0;
            Attribute[] a = PseudoCustomAttribute.GetCustomAttributes((RuntimeFieldInfo)target, typeof(object) as RuntimeType, out pcaCount);

            if (pcaCount == 0) 
                return cad;
 
            CustomAttributeData[] pca = new CustomAttributeData[cad.Count + pcaCount]; 
            cad.CopyTo(pca, pcaCount);
            for (int i = 0; i < pcaCount; i++) 
            {
                pca[i] = new CustomAttributeData(a[i]);
            }
 
            return Array.AsReadOnly(pca);
        } 
 
        [System.Security.SecuritySafeCritical]  // auto-generated
        internal static IList GetCustomAttributesInternal(RuntimeMethodInfo target) 
        {
            Contract.Assert(target != null);

            IList cad = GetCustomAttributes(target.GetRuntimeModule(), target.MetadataToken); 

            int pcaCount = 0; 
            Attribute[] a = PseudoCustomAttribute.GetCustomAttributes((RuntimeMethodInfo)target, typeof(object) as RuntimeType, true, out pcaCount); 

            if (pcaCount == 0) 
                return cad;

            CustomAttributeData[] pca = new CustomAttributeData[cad.Count + pcaCount];
            cad.CopyTo(pca, pcaCount); 
            for (int i = 0; i < pcaCount; i++)
            { 
                pca[i] = new CustomAttributeData(a[i]); 
            }
 
            return Array.AsReadOnly(pca);
        }

        [System.Security.SecuritySafeCritical]  // auto-generated 
        internal static IList GetCustomAttributesInternal(RuntimeConstructorInfo target)
        { 
            Contract.Assert(target != null); 

            return GetCustomAttributes(target.GetRuntimeModule(), target.MetadataToken); 
        }

        [System.Security.SecuritySafeCritical]  // auto-generated
        internal static IList GetCustomAttributesInternal(RuntimeEventInfo target) 
        {
            Contract.Assert(target != null); 
 
            return GetCustomAttributes(target.GetRuntimeModule(), target.MetadataToken);
        } 

        [System.Security.SecuritySafeCritical]  // auto-generated
        internal static IList GetCustomAttributesInternal(RuntimePropertyInfo target)
        { 
            Contract.Assert(target != null);
 
            return GetCustomAttributes(target.GetRuntimeModule(), target.MetadataToken); 
        }
 
        [System.Security.SecuritySafeCritical]  // auto-generated
        internal static IList GetCustomAttributesInternal(RuntimeModule target)
        {
            Contract.Assert(target != null); 

            if (target.IsResource()) 
                return new List(); 

            return GetCustomAttributes(target, target.MetadataToken); 
        }

        [System.Security.SecuritySafeCritical]  // auto-generated
        internal static IList GetCustomAttributesInternal(RuntimeAssembly target) 
        {
            Contract.Assert(target != null); 
 
            IList cad = GetCustomAttributes((RuntimeModule)target.ManifestModule, RuntimeAssembly.GetToken(target.GetNativeHandle()));
 
            int pcaCount = 0;
            Attribute[] a = PseudoCustomAttribute.GetCustomAttributes(target, typeof(object) as RuntimeType, false, out pcaCount);

            if (pcaCount == 0) 
                return cad;
 
            CustomAttributeData[] pca = new CustomAttributeData[cad.Count + pcaCount]; 
            cad.CopyTo(pca, pcaCount);
            for (int i = 0; i < pcaCount; i++) 
            {
                pca[i] = new CustomAttributeData(a[i]);
            }
 
            return Array.AsReadOnly(pca);
        } 
 
        [System.Security.SecuritySafeCritical]  // auto-generated
        internal static IList GetCustomAttributesInternal(RuntimeParameterInfo target) 
        {
            Contract.Assert(target != null);

            IList cad = GetCustomAttributes(target.GetRuntimeModule(), target.MetadataToken); 

            int pcaCount = 0; 
            Attribute[] a = PseudoCustomAttribute.GetCustomAttributes(target, typeof(object) as RuntimeType, out pcaCount); 

            if (pcaCount == 0) 
                return cad;

            CustomAttributeData[] pca = new CustomAttributeData[cad.Count + pcaCount];
            cad.CopyTo(pca, pcaCount); 
            for (int i = 0; i < pcaCount; i++)
                pca[i] = new CustomAttributeData(a[i]); 
 
            return Array.AsReadOnly(pca);
        } 
        #endregion

        #region Private Static Methods
        private static CustomAttributeEncoding TypeToCustomAttributeEncoding(RuntimeType type) 
        {
            if (type == (RuntimeType)typeof(int)) 
                return CustomAttributeEncoding.Int32; 

            if (type.IsEnum) 
                return CustomAttributeEncoding.Enum;

            if (type == (RuntimeType)typeof(string))
                return CustomAttributeEncoding.String; 

            if (type == (RuntimeType)typeof(Type)) 
                return CustomAttributeEncoding.Type; 

            if (type == (RuntimeType)typeof(object)) 
                return CustomAttributeEncoding.Object;

            if (type.IsArray)
                return CustomAttributeEncoding.Array; 

            if (type == (RuntimeType)typeof(char)) 
                return CustomAttributeEncoding.Char; 

            if (type == (RuntimeType)typeof(bool)) 
                return CustomAttributeEncoding.Boolean;

            if (type == (RuntimeType)typeof(byte))
                return CustomAttributeEncoding.Byte; 

            if (type == (RuntimeType)typeof(sbyte)) 
                return CustomAttributeEncoding.SByte; 

            if (type == (RuntimeType)typeof(short)) 
                return CustomAttributeEncoding.Int16;

            if (type == (RuntimeType)typeof(ushort))
                return CustomAttributeEncoding.UInt16; 

            if (type == (RuntimeType)typeof(uint)) 
                return CustomAttributeEncoding.UInt32; 

            if (type == (RuntimeType)typeof(long)) 
                return CustomAttributeEncoding.Int64;

            if (type == (RuntimeType)typeof(ulong))
                return CustomAttributeEncoding.UInt64; 

            if (type == (RuntimeType)typeof(float)) 
                return CustomAttributeEncoding.Float; 

            if (type == (RuntimeType)typeof(double)) 
                return CustomAttributeEncoding.Double;

            // System.Enum is neither an Enum nor a Class
            if (type == (RuntimeType)typeof(Enum)) 
                return CustomAttributeEncoding.Object;
 
            if (type.IsClass) 
                return CustomAttributeEncoding.Object;
 
            if (type.IsInterface)
                return CustomAttributeEncoding.Object;

            if (type.IsValueType) 
                return CustomAttributeEncoding.Undefined;
 
            throw new ArgumentException(Environment.GetResourceString("Argument_InvalidKindOfTypeForCA"), "type"); 
        }
        private static CustomAttributeType InitCustomAttributeType(RuntimeType parameterType) 
        {
            CustomAttributeEncoding encodedType = CustomAttributeData.TypeToCustomAttributeEncoding(parameterType);
            CustomAttributeEncoding encodedArrayType = CustomAttributeEncoding.Undefined;
            CustomAttributeEncoding encodedEnumType = CustomAttributeEncoding.Undefined; 
            string enumName = null;
 
            if (encodedType == CustomAttributeEncoding.Array) 
            {
                parameterType = (RuntimeType)parameterType.GetElementType(); 
                encodedArrayType = CustomAttributeData.TypeToCustomAttributeEncoding(parameterType);
            }

            if (encodedType == CustomAttributeEncoding.Enum || encodedArrayType == CustomAttributeEncoding.Enum) 
            {
                encodedEnumType = TypeToCustomAttributeEncoding((RuntimeType)Enum.GetUnderlyingType(parameterType)); 
                enumName = parameterType.AssemblyQualifiedName; 
            }
 
            return new CustomAttributeType(encodedType, encodedArrayType, encodedEnumType, enumName);
        }
        [System.Security.SecurityCritical]  // auto-generated
        private static IList GetCustomAttributes(RuntimeModule module, int tkTarget) 
        {
            CustomAttributeRecord[] records = GetCustomAttributeRecords(module, tkTarget); 
 
            CustomAttributeData[] customAttributes = new CustomAttributeData[records.Length];
            for (int i = 0; i < records.Length; i++) 
                customAttributes[i] = new CustomAttributeData(module, records[i]);

            return Array.AsReadOnly(customAttributes);
        } 
        #endregion
 
        #region Internal Static Members 
        [System.Security.SecurityCritical]  // auto-generated
        internal unsafe static CustomAttributeRecord[] GetCustomAttributeRecords(RuntimeModule module, int targetToken) 
        {
            MetadataImport scope = module.MetadataImport;

            int cCustomAttributeTokens = scope.EnumCustomAttributesCount(targetToken); 
            int* tkCustomAttributeTokens = stackalloc int[cCustomAttributeTokens];
            scope.EnumCustomAttributes(targetToken, tkCustomAttributeTokens, cCustomAttributeTokens); 
 
            CustomAttributeRecord[] records = new CustomAttributeRecord[cCustomAttributeTokens];
 
            for (int i = 0; i < cCustomAttributeTokens; i++)
            {
                scope.GetCustomAttributeProps(
                    tkCustomAttributeTokens[i], out records[i].tkCtor.Value, out records[i].blob); 
            }
 
            return records; 
        }
 
        internal static CustomAttributeTypedArgument Filter(IList attrs, Type caType, string name)
        {
            for (int i = 0; i < attrs.Count; i++)
            { 
                if (attrs[i].Constructor.DeclaringType == caType)
                { 
                    IList namedArguments = attrs[i].NamedArguments; 
                    for (int j = 0; j < namedArguments.Count; j++)
                    { 
                        if (namedArguments[j].MemberInfo.Name.Equals(name))
                            return namedArguments[j].TypedValue;
                    }
                } 
            }
 
            return new CustomAttributeTypedArgument(); 
        }
 
        internal static CustomAttributeTypedArgument Filter(IList attrs, Type caType, int parameter)
        {
            for (int i = 0; i < attrs.Count; i++)
            { 
                if (attrs[i].Constructor.DeclaringType == caType)
                { 
                    return attrs[i].ConstructorArguments[parameter]; 
                }
            } 

            return new CustomAttributeTypedArgument();
        }
        #endregion 

        #region Private Data Members 
        private ConstructorInfo m_ctor; 
        private RuntimeModule m_scope;
        private MemberInfo[] m_members; 
        private CustomAttributeCtorParameter[] m_ctorParams;
        private CustomAttributeNamedParameter[] m_namedParams;
        private IList m_typedCtorArgs;
        private IList m_namedArgs; 
        #endregion
 
        #region Constructor 
        [System.Security.SecurityCritical]  // auto-generated
        protected CustomAttributeData() 
        {
        }

        [System.Security.SecuritySafeCritical]  // auto-generated 
        private CustomAttributeData(RuntimeModule scope, CustomAttributeRecord caRecord)
        { 
            m_scope = scope; 
            m_ctor = (RuntimeConstructorInfo)RuntimeType.GetMethodBase(scope, caRecord.tkCtor);
 
            ParameterInfo[] parameters = m_ctor.GetParametersNoCopy();
            m_ctorParams = new CustomAttributeCtorParameter[parameters.Length];
            for (int i = 0; i < parameters.Length; i++)
                m_ctorParams[i] = new CustomAttributeCtorParameter(InitCustomAttributeType((RuntimeType)parameters[i].ParameterType)); 

            FieldInfo[] fields = m_ctor.DeclaringType.GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic); 
            PropertyInfo[] properties = m_ctor.DeclaringType.GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic); 
            m_namedParams = new CustomAttributeNamedParameter[properties.Length + fields.Length];
            for (int i = 0; i < fields.Length; i++) 
                m_namedParams[i] = new CustomAttributeNamedParameter(
                    fields[i].Name, CustomAttributeEncoding.Field, InitCustomAttributeType((RuntimeType)fields[i].FieldType));
            for (int i = 0; i < properties.Length; i++)
                m_namedParams[i + fields.Length] = new CustomAttributeNamedParameter( 
                    properties[i].Name, CustomAttributeEncoding.Property, InitCustomAttributeType((RuntimeType)properties[i].PropertyType));
 
            m_members = new MemberInfo[fields.Length + properties.Length]; 
            fields.CopyTo(m_members, 0);
            properties.CopyTo(m_members, fields.Length); 

            CustomAttributeEncodedArgument.ParseAttributeArguments(caRecord.blob, ref m_ctorParams, ref m_namedParams, m_scope);
        }
        #endregion 

        #region Pseudo Custom Attribute Constructor 
        internal CustomAttributeData(Attribute attribute) 
        {
            if (attribute is DllImportAttribute) 
                Init((DllImportAttribute)attribute);
            else if (attribute is FieldOffsetAttribute)
                Init((FieldOffsetAttribute)attribute);
            else if (attribute is MarshalAsAttribute) 
                Init((MarshalAsAttribute)attribute);
            else if (attribute is TypeForwardedToAttribute) 
                Init((TypeForwardedToAttribute)attribute); 
            else
                Init(attribute); 
        }
        private void Init(DllImportAttribute dllImport)
        {
            Type type = typeof(DllImportAttribute); 
            m_ctor = type.GetConstructors(BindingFlags.Public | BindingFlags.Instance)[0];
            m_typedCtorArgs = Array.AsReadOnly(new CustomAttributeTypedArgument[] 
            { 
                new CustomAttributeTypedArgument(dllImport.Value),
            }); 

            m_namedArgs = Array.AsReadOnly(new CustomAttributeNamedArgument[]
            {
                new CustomAttributeNamedArgument(type.GetField("EntryPoint"), dllImport.EntryPoint), 
                new CustomAttributeNamedArgument(type.GetField("CharSet"), dllImport.CharSet),
                new CustomAttributeNamedArgument(type.GetField("ExactSpelling"), dllImport.ExactSpelling), 
                new CustomAttributeNamedArgument(type.GetField("SetLastError"), dllImport.SetLastError), 
                new CustomAttributeNamedArgument(type.GetField("PreserveSig"), dllImport.PreserveSig),
                new CustomAttributeNamedArgument(type.GetField("CallingConvention"), dllImport.CallingConvention), 
                new CustomAttributeNamedArgument(type.GetField("BestFitMapping"), dllImport.BestFitMapping),
                new CustomAttributeNamedArgument(type.GetField("ThrowOnUnmappableChar"), dllImport.ThrowOnUnmappableChar)

            }); 
        }
        private void Init(FieldOffsetAttribute fieldOffset) 
        { 
            m_ctor = typeof(FieldOffsetAttribute).GetConstructors(BindingFlags.Public | BindingFlags.Instance)[0];
            m_typedCtorArgs = Array.AsReadOnly(new CustomAttributeTypedArgument[] { 
                new CustomAttributeTypedArgument(fieldOffset.Value)
            });
            m_namedArgs = Array.AsReadOnly(new CustomAttributeNamedArgument[0]);
        } 
        private void Init(MarshalAsAttribute marshalAs)
        { 
            Type type = typeof(MarshalAsAttribute); 
            m_ctor = type.GetConstructors(BindingFlags.Public | BindingFlags.Instance)[0];
            m_typedCtorArgs = Array.AsReadOnly(new CustomAttributeTypedArgument[] 
            {
                new CustomAttributeTypedArgument(marshalAs.Value),
            });
 
            int i = 3; // ArraySubType, SizeParamIndex, SizeConst
            if (marshalAs.MarshalType != null) i++; 
            if (marshalAs.MarshalTypeRef != null) i++; 
            if (marshalAs.MarshalCookie != null) i++;
#if FEATURE_COMINTEROP 
            i++; // IidParameterIndex
            i++; // SafeArraySubType
            if (marshalAs.SafeArrayUserDefinedSubType != null) i++;
#endif // FEATURE_COMINTEROP 
            CustomAttributeNamedArgument[] namedArgs = new CustomAttributeNamedArgument[i];
 
            i = 0; 
            namedArgs[i++] = new CustomAttributeNamedArgument(type.GetField("ArraySubType"), marshalAs.ArraySubType);
            namedArgs[i++] = new CustomAttributeNamedArgument(type.GetField("SizeParamIndex"), marshalAs.SizeParamIndex); 
            namedArgs[i++] = new CustomAttributeNamedArgument(type.GetField("SizeConst"), marshalAs.SizeConst);
#if FEATURE_COMINTEROP
            namedArgs[i++] = new CustomAttributeNamedArgument(type.GetField("IidParameterIndex"), marshalAs.IidParameterIndex);
            namedArgs[i++] = new CustomAttributeNamedArgument(type.GetField("SafeArraySubType"), marshalAs.SafeArraySubType); 
#endif // FEATURE_COMINTEROP
            if (marshalAs.MarshalType != null) 
                namedArgs[i++] = new CustomAttributeNamedArgument(type.GetField("MarshalType"), marshalAs.MarshalType); 
            if (marshalAs.MarshalTypeRef != null)
                namedArgs[i++] = new CustomAttributeNamedArgument(type.GetField("MarshalTypeRef"), marshalAs.MarshalTypeRef); 
            if (marshalAs.MarshalCookie != null)
                namedArgs[i++] = new CustomAttributeNamedArgument(type.GetField("MarshalCookie"), marshalAs.MarshalCookie);
#if FEATURE_COMINTEROP
            if (marshalAs.SafeArrayUserDefinedSubType != null) 
                namedArgs[i++] = new CustomAttributeNamedArgument(type.GetField("SafeArrayUserDefinedSubType"), marshalAs.SafeArrayUserDefinedSubType);
#endif // FEATURE_COMINTEROP 
 
            m_namedArgs = Array.AsReadOnly(namedArgs);
        } 
        private void Init(TypeForwardedToAttribute forwardedTo)
        {
            Type type = typeof(TypeForwardedToAttribute);
 
            Type[] sig = new Type[] { typeof(Type) };
            m_ctor = type.GetConstructor(BindingFlags.Public | BindingFlags.Instance, null, sig, null); 
 
            CustomAttributeTypedArgument[] typedArgs = new CustomAttributeTypedArgument[1];
            typedArgs[0] = new CustomAttributeTypedArgument(typeof(Type), forwardedTo.Destination); 
            m_typedCtorArgs = Array.AsReadOnly(typedArgs);

            CustomAttributeNamedArgument[] namedArgs = new CustomAttributeNamedArgument[0];
            m_namedArgs = Array.AsReadOnly(namedArgs); 
        }
        private void Init(object pca) 
        { 
            m_ctor = pca.GetType().GetConstructors(BindingFlags.Public | BindingFlags.Instance)[0];
            m_typedCtorArgs = Array.AsReadOnly(new CustomAttributeTypedArgument[0]); 
            m_namedArgs = Array.AsReadOnly(new CustomAttributeNamedArgument[0]);
        }
        #endregion
 
        #region Object Override
        public override string ToString() 
        { 
            string ctorArgs = "";
            for (int i = 0; i < ConstructorArguments.Count; i ++) 
                ctorArgs += String.Format(CultureInfo.CurrentCulture, i == 0 ? "{0}" : ", {0}", ConstructorArguments[i]);

            string namedArgs = "";
            for (int i = 0; i < NamedArguments.Count; i ++) 
                namedArgs += String.Format(CultureInfo.CurrentCulture, i == 0 && ctorArgs.Length == 0 ? "{0}" : ", {0}", NamedArguments[i]);
 
            return String.Format(CultureInfo.CurrentCulture, "[{0}({1}{2})]", Constructor.DeclaringType.FullName, ctorArgs, namedArgs); 
        }
        public override int GetHashCode() 
        {
            return base.GetHashCode();
        }
        public override bool Equals(object obj) 
        {
            return obj == (object)this; 
        } 
        #endregion
 
        #region Public Members
        [System.Runtime.InteropServices.ComVisible(true)]
        public virtual ConstructorInfo Constructor { get { return m_ctor; } }
 
        [System.Runtime.InteropServices.ComVisible(true)]
        public virtual IList ConstructorArguments 
        { 
            get
            { 
                if (m_typedCtorArgs == null)
                {
                    CustomAttributeTypedArgument[] typedCtorArgs = new CustomAttributeTypedArgument[m_ctorParams.Length];
 
                    for (int i = 0; i < typedCtorArgs.Length; i++)
                    { 
                        CustomAttributeEncodedArgument encodedArg = m_ctorParams[i].CustomAttributeEncodedArgument; 

                        typedCtorArgs[i] = new CustomAttributeTypedArgument(m_scope, m_ctorParams[i].CustomAttributeEncodedArgument); 
                    }

                    m_typedCtorArgs = Array.AsReadOnly(typedCtorArgs);
                } 

                return m_typedCtorArgs; 
            } 
        }
 
        public virtual IList NamedArguments
        {
            get
            { 
                if (m_namedArgs == null)
                { 
                    if (m_namedParams == null) 
                        return null;
 
                    int cNamedArgs = 0;
                    for (int i = 0; i < m_namedParams.Length; i++)
                    {
                        if (m_namedParams[i].EncodedArgument.CustomAttributeType.EncodedType != CustomAttributeEncoding.Undefined) 
                            cNamedArgs++;
                    } 
 
                    CustomAttributeNamedArgument[] namedArgs = new CustomAttributeNamedArgument[cNamedArgs];
 
                    for (int i = 0, j = 0; i < m_namedParams.Length; i++)
                    {
                        if (m_namedParams[i].EncodedArgument.CustomAttributeType.EncodedType != CustomAttributeEncoding.Undefined)
                            namedArgs[j++] = new CustomAttributeNamedArgument( 
                                m_members[i], new CustomAttributeTypedArgument(m_scope, m_namedParams[i].EncodedArgument));
                    } 
 
                    m_namedArgs = Array.AsReadOnly(namedArgs);
                } 

                return m_namedArgs;
            }
        } 
        #endregion
    } 
 
    [Serializable]
    [System.Runtime.InteropServices.ComVisible(true)] 
    public struct CustomAttributeNamedArgument
    {
        #region Public Static Members
        public static bool operator ==(CustomAttributeNamedArgument left, CustomAttributeNamedArgument right) 
        {
            return left.Equals(right); 
        } 
        public static bool operator !=(CustomAttributeNamedArgument left, CustomAttributeNamedArgument right)
        { 
            return !left.Equals(right);
        }
        #endregion
 
        #region Private Data Members
        private MemberInfo m_memberInfo; 
        private CustomAttributeTypedArgument m_value; 
        #endregion
 
        #region Constructor
        public CustomAttributeNamedArgument(MemberInfo memberInfo, object value)
        {
            if (memberInfo == null) 
                throw new ArgumentNullException("memberInfo");
 
            Type type = null; 
            FieldInfo field = memberInfo as FieldInfo;
            PropertyInfo property = memberInfo as PropertyInfo; 

            if (field != null)
                type = field.FieldType;
            else if (property != null) 
                type = property.PropertyType;
            else 
                throw new ArgumentException(Environment.GetResourceString("Argument_InvalidMemberForNamedArgument")); 

            m_memberInfo = memberInfo; 
            m_value = new CustomAttributeTypedArgument(type, value);
        }

        public CustomAttributeNamedArgument(MemberInfo memberInfo, CustomAttributeTypedArgument typedArgument) 
        {
            if (memberInfo == null) 
                throw new ArgumentNullException("memberInfo"); 

            m_memberInfo = memberInfo; 
            m_value = typedArgument;
        }
        #endregion
 
        #region Object Override
        public override string ToString() 
        { 
            return String.Format(CultureInfo.CurrentCulture, "{0} = {1}", MemberInfo.Name, TypedValue.ToString(ArgumentType != typeof(object)));
        } 
        public override int GetHashCode()
        {
            return base.GetHashCode();
        } 
        public override bool Equals(object obj)
        { 
            return obj == (object)this; 
        }
        #endregion 

        #region Internal Members
        internal Type ArgumentType
        { 
            get
            { 
                return m_memberInfo is FieldInfo ? 
                    ((FieldInfo)m_memberInfo).FieldType :
                    ((PropertyInfo)m_memberInfo).PropertyType; 
            }
        }
        #endregion
 
        #region Public Members
        public MemberInfo MemberInfo { get { return m_memberInfo; } } 
        public CustomAttributeTypedArgument TypedValue { get { return m_value; } } 
        #endregion
    } 

    [Serializable]
    [ComVisible(true)]
    public struct CustomAttributeTypedArgument 
    {
        #region Public Static Members 
        public static bool operator ==(CustomAttributeTypedArgument left, CustomAttributeTypedArgument right) 
        {
            return left.Equals(right); 
        }
        public static bool operator !=(CustomAttributeTypedArgument left, CustomAttributeTypedArgument right)
        {
            return !left.Equals(right); 
        }
        #endregion 
 
        #region Private Static Methods
        private static Type CustomAttributeEncodingToType(CustomAttributeEncoding encodedType) 
        {
            switch (encodedType)
            {
                case (CustomAttributeEncoding.Enum): 
                    return typeof(Enum);
 
                case (CustomAttributeEncoding.Int32): 
                    return typeof(int);
 
                case (CustomAttributeEncoding.String):
                    return typeof(string);

                case (CustomAttributeEncoding.Type): 
                    return typeof(Type);
 
                case (CustomAttributeEncoding.Array): 
                    return typeof(Array);
 
                case (CustomAttributeEncoding.Char):
                    return typeof(char);

                case (CustomAttributeEncoding.Boolean): 
                    return typeof(bool);
 
                case (CustomAttributeEncoding.SByte): 
                    return typeof(sbyte);
 
                case (CustomAttributeEncoding.Byte):
                    return typeof(byte);

                case (CustomAttributeEncoding.Int16): 
                    return typeof(short);
 
                case (CustomAttributeEncoding.UInt16): 
                    return typeof(ushort);
 
                case (CustomAttributeEncoding.UInt32):
                    return typeof(uint);

                case (CustomAttributeEncoding.Int64): 
                    return typeof(long);
 
                case (CustomAttributeEncoding.UInt64): 
                    return typeof(ulong);
 
                case (CustomAttributeEncoding.Float):
                    return typeof(float);

                case (CustomAttributeEncoding.Double): 
                    return typeof(double);
 
                case (CustomAttributeEncoding.Object): 
                    return typeof(object);
 
                default :
                    throw new ArgumentException(Environment.GetResourceString("Arg_EnumIllegalVal", (int)encodedType), "encodedType");
            }
        } 
        [System.Security.SecuritySafeCritical]  // auto-generated
        private static object EncodedValueToRawValue(long val, CustomAttributeEncoding encodedType) 
        { 
            switch (encodedType)
            { 
                case CustomAttributeEncoding.Boolean:
                    return (byte)val != 0;

                case CustomAttributeEncoding.Char: 
                    return (char)val;
 
                case CustomAttributeEncoding.Byte: 
                    return (byte)val;
 
                case CustomAttributeEncoding.SByte:
                    return (sbyte)val;

                case CustomAttributeEncoding.Int16: 
                    return (short)val;
 
                case CustomAttributeEncoding.UInt16: 
                    return (ushort)val;
 
                case CustomAttributeEncoding.Int32:
                    return (int)val;

                case CustomAttributeEncoding.UInt32: 
                    return (uint)val;
 
                case CustomAttributeEncoding.Int64: 
                    return (long)val;
 
                case CustomAttributeEncoding.UInt64:
                    return (ulong)val;

                case CustomAttributeEncoding.Float: 
                    unsafe { return *(float*)&val; }
 
                case CustomAttributeEncoding.Double: 
                    unsafe { return *(double*)&val; }
 
                default:
                    throw new ArgumentException(Environment.GetResourceString("Arg_EnumIllegalVal", (int)val), "val");
            }
        } 
        private static RuntimeType ResolveType(RuntimeModule scope, string typeName)
        { 
            RuntimeType type = RuntimeTypeHandle.GetTypeByNameUsingCARules(typeName, scope); 

            if (type == null) 
                throw new InvalidOperationException(
                    String.Format(CultureInfo.CurrentUICulture, Environment.GetResourceString("Arg_CATypeResolutionFailed"), typeName));

            return type; 
        }
        #endregion 
 
        #region Private Data Members
        private object m_value; 
        private Type m_argumentType;
        #endregion

        #region Constructor 
        public CustomAttributeTypedArgument(Type argumentType, object value)
        { 
            // value can be null. 
            if (argumentType == null)
                throw new ArgumentNullException("argumentType"); 

            m_value = (value == null) ? null : CanonicalizeValue(value);
            m_argumentType = argumentType;
        } 

        public CustomAttributeTypedArgument(object value) 
        { 
            // value cannot be null.
            if (value == null) 
                throw new ArgumentNullException("value");

            m_value = CanonicalizeValue(value);
            m_argumentType = value.GetType(); 
        }
 
        private static object CanonicalizeValue(object value) 
        {
            Contract.Assert(value != null); 

            if (value.GetType().IsEnum)
            {
                return ((Enum)value).GetValue(); 
            }
            return value; 
        } 

        [System.Security.SecuritySafeCritical]  // auto-generated 
        internal CustomAttributeTypedArgument(RuntimeModule scope, CustomAttributeEncodedArgument encodedArg)
        {
            CustomAttributeEncoding encodedType = encodedArg.CustomAttributeType.EncodedType;
 
            if (encodedType == CustomAttributeEncoding.Undefined)
                throw new ArgumentException("encodedArg"); 
 
            else if (encodedType == CustomAttributeEncoding.Enum)
            { 
                m_argumentType = ResolveType(scope, encodedArg.CustomAttributeType.EnumName);
                m_value = EncodedValueToRawValue(encodedArg.PrimitiveValue, encodedArg.CustomAttributeType.EncodedEnumType);
            }
            else if (encodedType == CustomAttributeEncoding.String) 
            {
                m_argumentType = typeof(string); 
                m_value = encodedArg.StringValue; 
            }
            else if (encodedType == CustomAttributeEncoding.Type) 
            {
                m_argumentType = typeof(Type);

                m_value = null; 

                if (encodedArg.StringValue != null) 
                    m_value = ResolveType(scope, encodedArg.StringValue); 
            }
            else if (encodedType == CustomAttributeEncoding.Array) 
            {
                encodedType = encodedArg.CustomAttributeType.EncodedArrayType;
                Type elementType;
 
                if (encodedType == CustomAttributeEncoding.Enum)
                { 
                    elementType = ResolveType(scope, encodedArg.CustomAttributeType.EnumName); 
                }
                else 
                {
                    elementType = CustomAttributeEncodingToType(encodedType);
                }
 
                m_argumentType = elementType.MakeArrayType();
 
                if (encodedArg.ArrayValue == null) 
                {
                    m_value = null; 
                }
                else
                {
                    CustomAttributeTypedArgument[] arrayValue = new CustomAttributeTypedArgument[encodedArg.ArrayValue.Length]; 
                    for (int i = 0; i < arrayValue.Length; i++)
                        arrayValue[i] = new CustomAttributeTypedArgument(scope, encodedArg.ArrayValue[i]); 
 
                    m_value = Array.AsReadOnly(arrayValue);
                } 
            }
            else
            {
                m_argumentType = CustomAttributeEncodingToType(encodedType); 
                m_value = EncodedValueToRawValue(encodedArg.PrimitiveValue, encodedType);
            } 
        } 
        #endregion
 
        #region Object Overrides
        public override string ToString() { return ToString(false); }
        [System.Security.SecuritySafeCritical]  // auto-generated
        internal string ToString(bool typed) 
        {
            if (ArgumentType.IsEnum) 
                return String.Format(CultureInfo.CurrentCulture, typed ? "{0}" : "({1}){0}", Value, ArgumentType.FullName); 

            else if (Value == null) 
                return String.Format(CultureInfo.CurrentCulture, typed ? "null" : "({0})null", ArgumentType.Name);

            else if (ArgumentType == typeof(string))
                return String.Format(CultureInfo.CurrentCulture, "\"{0}\"", Value); 

            else if (ArgumentType == typeof(char)) 
                return String.Format(CultureInfo.CurrentCulture, "'{0}'", Value); 

            else if (ArgumentType == typeof(Type)) 
                return String.Format(CultureInfo.CurrentCulture, "typeof({0})", ((Type)Value).FullName);

            else if (ArgumentType.IsArray)
            { 
                string result = null;
                IList array = Value as IList; 
 
                Type elementType = ArgumentType.GetElementType();
                result = String.Format(CultureInfo.CurrentCulture, @"new {0}[{1}] {{ ", elementType.IsEnum ? elementType.FullName : elementType.Name, array.Count); 

                for (int i = 0; i < array.Count; i++)
                    result += String.Format(CultureInfo.CurrentCulture, i == 0 ? "{0}" : ", {0}", array[i].ToString(elementType != typeof(object)));
 
                return result += " }";
            } 
 
            return String.Format(CultureInfo.CurrentCulture, typed ? "{0}" : "({1}){0}", Value, ArgumentType.Name);
        } 
        [System.Security.SecuritySafeCritical]  // auto-generated
        public override int GetHashCode()
        {
            return base.GetHashCode(); 
        }
        public override bool Equals(object obj) 
        { 
            return obj == (object)this;
        } 
        #endregion

        #region Public Members
        public Type ArgumentType 
        {
            get 
            { 
                return m_argumentType;
            } 
        }
        public object Value
        {
            get 
            {
                return m_value; 
            } 
        }
        #endregion 
    }

    [Serializable]
    internal struct CustomAttributeRecord 
    {
        internal ConstArray blob; 
        internal MetadataToken tkCtor; 
    }
 
    [Serializable]
    internal enum CustomAttributeEncoding : int
    {
        Undefined = 0, 
        Boolean = CorElementType.Boolean,
        Char = CorElementType.Char, 
        SByte = CorElementType.I1, 
        Byte = CorElementType.U1,
        Int16 = CorElementType.I2, 
        UInt16 = CorElementType.U2,
        Int32 = CorElementType.I4,
        UInt32 = CorElementType.U4,
        Int64 = CorElementType.I8, 
        UInt64 = CorElementType.U8,
        Float = CorElementType.R4, 
        Double = CorElementType.R8, 
        String = CorElementType.String,
        Array = CorElementType.SzArray, 
        Type = 0x50,
        Object = 0x51,
        Field = 0x53,
        Property = 0x54, 
        Enum = 0x55
    } 
 
    [Serializable]
    [StructLayout(LayoutKind.Auto)] 
    internal struct CustomAttributeEncodedArgument
    {
        #region Parser
        [System.Security.SecurityCritical]  // auto-generated 
        [ResourceExposure(ResourceScope.None)]
        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        private static extern void ParseAttributeArguments( 
            IntPtr pCa,
            int cCa, 
            ref CustomAttributeCtorParameter[] CustomAttributeCtorParameters,
            ref CustomAttributeNamedParameter[] CustomAttributeTypedArgument,
            RuntimeAssembly assembly);
 
        [System.Security.SecurityCritical]  // auto-generated
        internal static void ParseAttributeArguments(ConstArray attributeBlob, 
            ref CustomAttributeCtorParameter[] customAttributeCtorParameters, 
            ref CustomAttributeNamedParameter[] customAttributeNamedParameters,
            RuntimeModule customAttributeModule) 
        {
            if (customAttributeModule == null)
                throw new ArgumentNullException("customAttributeModule");
            Contract.EndContractBlock(); 

            Contract.Assert(customAttributeCtorParameters != null); 
            Contract.Assert(customAttributeNamedParameters != null); 

            if (customAttributeCtorParameters.Length != 0 || customAttributeNamedParameters.Length != 0) 
            {
                unsafe
                {
                    ParseAttributeArguments( 
                        attributeBlob.Signature,
                        (int)attributeBlob.Length, 
                        ref customAttributeCtorParameters, 
                        ref customAttributeNamedParameters,
                        (RuntimeAssembly)customAttributeModule.Assembly); 
                }
            }
        }
        #endregion 

        #region Private Data Members 
        private long m_primitiveValue; 
        private CustomAttributeEncodedArgument[] m_arrayValue;
        private string m_stringValue; 
        private CustomAttributeType m_type;
        #endregion

        #region Public Members 
        public CustomAttributeType CustomAttributeType { get { return m_type; } }
        public long PrimitiveValue { get { return m_primitiveValue; } } 
        public CustomAttributeEncodedArgument[] ArrayValue { get { return m_arrayValue; } } 
        public string StringValue { get { return m_stringValue; } }
        #endregion 
    }

    [Serializable]
    [StructLayout(LayoutKind.Auto)] 
    internal struct CustomAttributeNamedParameter
    { 
        #region Private Data Members 
        private string m_argumentName;
        private CustomAttributeEncoding m_fieldOrProperty; 
        private CustomAttributeEncoding m_padding;
        private CustomAttributeType m_type;
        private CustomAttributeEncodedArgument m_encodedArgument;
        #endregion 

        #region Constructor 
        public CustomAttributeNamedParameter(string argumentName, CustomAttributeEncoding fieldOrProperty, CustomAttributeType type) 
        {
            if (argumentName == null) 
                throw new ArgumentNullException("argumentName");
            Contract.EndContractBlock();

            m_argumentName = argumentName; 
            m_fieldOrProperty = fieldOrProperty;
            m_padding = fieldOrProperty; 
            m_type = type; 
            m_encodedArgument = new CustomAttributeEncodedArgument();
        } 
        #endregion

        #region Public Members
        public CustomAttributeEncodedArgument EncodedArgument { get { return m_encodedArgument; } } 
        #endregion
    } 
 
    [Serializable]
    [StructLayout(LayoutKind.Auto)] 
    internal struct CustomAttributeCtorParameter
    {
        #region Private Data Members
        private CustomAttributeType m_type; 
        private CustomAttributeEncodedArgument m_encodedArgument;
        #endregion 
 
        #region Constructor
        public CustomAttributeCtorParameter(CustomAttributeType type) 
        {
            m_type = type;
            m_encodedArgument = new CustomAttributeEncodedArgument();
        } 
        #endregion
 
        #region Public Members 
        public CustomAttributeEncodedArgument CustomAttributeEncodedArgument { get { return m_encodedArgument; } }
        #endregion 
    }

    // Note: This is a managed representation of a frame type defined in vm\frames.h; please ensure the layout remains
    // synchronized. 
    [StructLayout(LayoutKind.Sequential)]
    internal struct SecurityContextFrame 
    { 
        IntPtr m_GSCookie;      // This is actually at a negative offset in the real frame definition
        IntPtr __VFN_table;     // This is the real start of the SecurityContextFrame 
        IntPtr m_Next;
        IntPtr m_Assembly;

        [System.Security.SecurityCritical]  // auto-generated 
        [ResourceExposure(ResourceScope.None)]
        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        public extern void Push(RuntimeAssembly assembly); 

        [System.Security.SecurityCritical]  // auto-generated 
        [ResourceExposure(ResourceScope.None)]
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
        public extern void Pop(); 
    }
 
    [Serializable] 
    [StructLayout(LayoutKind.Auto)]
    internal struct CustomAttributeType 
    {
        #region Private Data Members
        /// The most complicated type is an enum[] in which case...
        private string m_enumName; // ...enum name 
        private CustomAttributeEncoding m_encodedType; // ...array
        private CustomAttributeEncoding m_encodedEnumType; // ...enum 
        private CustomAttributeEncoding m_encodedArrayType; // ...enum type 
        private CustomAttributeEncoding m_padding;
        #endregion 

        #region Constructor
        public CustomAttributeType(CustomAttributeEncoding encodedType, CustomAttributeEncoding encodedArrayType,
            CustomAttributeEncoding encodedEnumType, string enumName) 
        {
            m_encodedType = encodedType; 
            m_encodedArrayType = encodedArrayType; 
            m_encodedEnumType = encodedEnumType;
            m_enumName = enumName; 
            m_padding = m_encodedType;
        }
        #endregion
 
        #region Public Members
        public CustomAttributeEncoding EncodedType { get { return m_encodedType; } } 
        public CustomAttributeEncoding EncodedEnumType { get { return m_encodedEnumType; } } 
        public CustomAttributeEncoding EncodedArrayType { get { return m_encodedArrayType; } }
        [System.Runtime.InteropServices.ComVisible(true)] 
        public string EnumName { get { return m_enumName; } }
        #endregion
    }
 
    internal unsafe static class CustomAttribute
    { 
        #region Private Data Members 
        private static RuntimeType Type_RuntimeType = (RuntimeType)typeof(RuntimeType);
        private static RuntimeType Type_Type = (RuntimeType)typeof(Type); 
        #endregion

        #region Internal Static Members
        [System.Security.SecurityCritical]  // auto-generated 
        internal static bool IsDefined(RuntimeType type, RuntimeType caType, bool inherit)
        { 
            Contract.Requires(type != null); 

            if (type.GetElementType() != null) 
                return false;

            if (PseudoCustomAttribute.IsDefined(type, caType))
                return true; 

            if (IsCustomAttributeDefined(type.GetRuntimeModule(), type.MetadataToken, caType)) 
                return true; 

            if (!inherit) 
                return false;

            type = type.BaseType as RuntimeType;
 
            while (type != null)
            { 
                if (IsCustomAttributeDefined(type.GetRuntimeModule(), type.MetadataToken, caType, inherit)) 
                    return true;
 
                type = type.BaseType as RuntimeType;
            }

            return false; 
        }
 
        [System.Security.SecuritySafeCritical]  // auto-generated 
        internal static bool IsDefined(RuntimeMethodInfo method, RuntimeType caType, bool inherit)
        { 
            Contract.Requires(method != null);
            Contract.Requires(caType != null);

            if (PseudoCustomAttribute.IsDefined(method, caType)) 
                return true;
 
            if (IsCustomAttributeDefined(method.GetRuntimeModule(), method.MetadataToken, caType)) 
                return true;
 
            if (!inherit)
                return false;

            method = method.GetParentDefinition(); 

            while (method != null) 
            { 
                if (IsCustomAttributeDefined(method.GetRuntimeModule(), method.MetadataToken, caType, inherit))
                    return true; 

                method = method.GetParentDefinition();
            }
 
            return false;
        } 
 
        [System.Security.SecurityCritical]  // auto-generated
        internal static bool IsDefined(RuntimeConstructorInfo ctor, RuntimeType caType) 
        {
            Contract.Requires(ctor != null);
            Contract.Requires(caType != null);
 
            if (PseudoCustomAttribute.IsDefined(ctor, caType))
                return true; 
 
            return IsCustomAttributeDefined(ctor.GetRuntimeModule(), ctor.MetadataToken, caType);
        } 

        [System.Security.SecurityCritical]  // auto-generated
        internal static bool IsDefined(RuntimePropertyInfo property, RuntimeType caType)
        { 
            Contract.Requires(property != null);
            Contract.Requires(caType != null); 
 
            if (PseudoCustomAttribute.IsDefined(property, caType))
                return true; 

            return IsCustomAttributeDefined(property.GetRuntimeModule(), property.MetadataToken, caType);
        }
 
        [System.Security.SecurityCritical]  // auto-generated
        internal static bool IsDefined(RuntimeEventInfo e, RuntimeType caType) 
        { 
            Contract.Requires(e != null);
            Contract.Requires(caType != null); 

            if (PseudoCustomAttribute.IsDefined(e, caType))
                return true;
 
            return IsCustomAttributeDefined(e.GetRuntimeModule(), e.MetadataToken, caType);
        } 
 
        [System.Security.SecurityCritical]  // auto-generated
        internal static bool IsDefined(RuntimeFieldInfo field, RuntimeType caType) 
        {
            Contract.Requires(field != null);
            Contract.Requires(caType != null);
 
            if (PseudoCustomAttribute.IsDefined(field, caType))
                return true; 
 
            return IsCustomAttributeDefined(field.GetRuntimeModule(), field.MetadataToken, caType);
        } 

        [System.Security.SecurityCritical]  // auto-generated
        internal static bool IsDefined(RuntimeParameterInfo parameter, RuntimeType caType)
        { 
            Contract.Requires(parameter != null);
            Contract.Requires(caType != null); 
 
            if (PseudoCustomAttribute.IsDefined(parameter, caType))
                return true; 

            return IsCustomAttributeDefined(parameter.GetRuntimeModule(), parameter.MetadataToken, caType);
        }
 
        [System.Security.SecuritySafeCritical]  // auto-generated
        internal static bool IsDefined(RuntimeAssembly assembly, RuntimeType caType) 
        { 
            Contract.Requires(assembly != null);
            Contract.Requires(caType != null); 

            if (PseudoCustomAttribute.IsDefined(assembly, caType))
                return true;
 
            return IsCustomAttributeDefined(assembly.ManifestModule as RuntimeModule, RuntimeAssembly.GetToken(assembly.GetNativeHandle()), caType);
        } 
 
        [System.Security.SecurityCritical]  // auto-generated
        internal static bool IsDefined(RuntimeModule module, RuntimeType caType) 
        {
            Contract.Requires(module != null);
            Contract.Requires(caType != null);
 
            if (PseudoCustomAttribute.IsDefined(module, caType))
                return true; 
 
            return IsCustomAttributeDefined(module, module.MetadataToken, caType);
        } 

        [System.Security.SecurityCritical]  // auto-generated
        internal static Object[] GetCustomAttributes(RuntimeType type, RuntimeType caType, bool inherit)
        { 
            Contract.Requires(type != null);
            Contract.Requires(caType != null); 
 
            if (type.GetElementType() != null)
                return (caType.IsValueType) ? new object[0] : CreateAttributeArrayHelper(caType, 0); 

            if (type.IsGenericType && !type.IsGenericTypeDefinition)
                type = type.GetGenericTypeDefinition() as RuntimeType;
 
            int pcaCount = 0;
            Attribute[] pca = PseudoCustomAttribute.GetCustomAttributes(type, caType, true, out pcaCount); 
 
            // if we are asked to go up the hierarchy chain we have to do it now and regardless of the
            // attribute usage for the specific attribute because a derived attribute may override the usage... 
            // ... however if the attribute is sealed we can rely on the attribute usage
            if (!inherit || (caType.IsSealed && !CustomAttribute.GetAttributeUsage(caType).Inherited))
            {
                object[] attributes = GetCustomAttributes(type.GetRuntimeModule(), type.MetadataToken, pcaCount, caType, !AllowCriticalCustomAttributes(type)); 
                if (pcaCount > 0) Array.Copy(pca, 0, attributes, attributes.Length - pcaCount, pcaCount);
                return attributes; 
            } 

            List result = new List(); 
            bool mustBeInheritable = false;
            bool useObjectArray = (caType == null || caType.IsValueType || caType.ContainsGenericParameters);
            Type arrayType = useObjectArray ? typeof(object) : caType;
 
            while (pcaCount > 0)
                result.Add(pca[--pcaCount]); 
 
            while (type != (RuntimeType)typeof(object) && type != null)
            { 
                object[] attributes = GetCustomAttributes(type.GetRuntimeModule(), type.MetadataToken, 0, caType, mustBeInheritable, result, !AllowCriticalCustomAttributes(type));
                mustBeInheritable = true;
                for (int i = 0; i < attributes.Length; i++)
                    result.Add(attributes[i]); 

                type = type.BaseType as RuntimeType; 
            } 

            object[] typedResult = CreateAttributeArrayHelper(arrayType, result.Count); 
            Array.Copy(result.ToArray(), 0, typedResult, 0, result.Count);
            return typedResult;
        }
 
        private static bool AllowCriticalCustomAttributes(RuntimeType type)
        { 
            if (type.IsGenericParameter) 
            {
                // Generic parameters don't have transparency state, so look at the 
                // declaring method/type. One of declaringMethod or declaringType
                // must be set.
                MethodBase declaringMethod = type.DeclaringMethod;
                if (declaringMethod != null) 
                {
                    return AllowCriticalCustomAttributes(declaringMethod); 
                } 
                else
                { 
                    type = type.DeclaringType as RuntimeType;
                    Contract.Assert(type != null);
                }
            } 

            return !type.IsSecurityTransparent || SpecialAllowCriticalAttributes(type); 
        } 

        private static bool SpecialAllowCriticalAttributes(RuntimeType type) 
        {
            // Types participating in Type Equivalence are always transparent.
            // See TokenSecurityDescriptor::VerifySemanticDataComputed in securitymeta.cpp.
            // Because of that we allow critical attributes applied to full trust equivalent types. 

#if FEATURE_CORECLR 
            return false; 
#else
            return type.Assembly.IsFullyTrusted && RuntimeTypeHandle.IsEquivalentType(type); 
#endif //!FEATURE_CORECLR
        }

        private static bool AllowCriticalCustomAttributes(MethodBase method) 
        {
            Contract.Requires(method is RuntimeMethodInfo || method is RuntimeConstructorInfo); 
 
            return !method.IsSecurityTransparent ||
                SpecialAllowCriticalAttributes((RuntimeType)method.DeclaringType); 
        }

        private static bool AllowCriticalCustomAttributes(RuntimeFieldInfo field)
        { 
            return !field.IsSecurityTransparent ||
                SpecialAllowCriticalAttributes((RuntimeType)field.DeclaringType); 
        } 

        private static bool AllowCriticalCustomAttributes(RuntimeParameterInfo parameter) 
        {
            // Since parameters have no transparency state, we look at the defining method instead.
            return AllowCriticalCustomAttributes(parameter.DefiningMethod);
        } 

        [System.Security.SecurityCritical]  // auto-generated 
        internal static Object[] GetCustomAttributes(RuntimeMethodInfo method, RuntimeType caType, bool inherit) 
        {
            Contract.Requires(method != null); 
            Contract.Requires(caType != null);

            if (method.IsGenericMethod && !method.IsGenericMethodDefinition)
                method = method.GetGenericMethodDefinition() as RuntimeMethodInfo; 

            int pcaCount = 0; 
            Attribute[] pca = PseudoCustomAttribute.GetCustomAttributes(method, caType, true, out pcaCount); 

            // if we are asked to go up the hierarchy chain we have to do it now and regardless of the 
            // attribute usage for the specific attribute because a derived attribute may override the usage...
            // ... however if the attribute is sealed we can rely on the attribute usage
            if (!inherit || (caType.IsSealed && !CustomAttribute.GetAttributeUsage(caType).Inherited))
            { 
                object[] attributes = GetCustomAttributes(method.GetRuntimeModule(), method.MetadataToken, pcaCount, caType, !AllowCriticalCustomAttributes(method));
                if (pcaCount > 0) Array.Copy(pca, 0, attributes, attributes.Length - pcaCount, pcaCount); 
                return attributes; 
            }
 
            List result = new List();
            bool mustBeInheritable = false;
            bool useObjectArray = (caType == null || caType.IsValueType || caType.ContainsGenericParameters);
            Type arrayType = useObjectArray ? typeof(object) : caType; 

            while (pcaCount > 0) 
                result.Add(pca[--pcaCount]); 

            while (method != null) 
            {
                object[] attributes = GetCustomAttributes(method.GetRuntimeModule(), method.MetadataToken, 0, caType, mustBeInheritable, result, !AllowCriticalCustomAttributes(method));
                mustBeInheritable = true;
                for (int i = 0; i < attributes.Length; i++) 
                    result.Add(attributes[i]);
 
                method = method.GetParentDefinition(); 
            }
 
            object[] typedResult = CreateAttributeArrayHelper(arrayType, result.Count);
            Array.Copy(result.ToArray(), 0, typedResult, 0, result.Count);
            return typedResult;
        } 

        [System.Security.SecuritySafeCritical]  // auto-generated 
        internal static Object[] GetCustomAttributes(RuntimeConstructorInfo ctor, RuntimeType caType) 
        {
            Contract.Requires(ctor != null); 
            Contract.Requires(caType != null);

            int pcaCount = 0;
            Attribute[] pca = PseudoCustomAttribute.GetCustomAttributes(ctor, caType, true, out pcaCount); 
            object[] attributes = GetCustomAttributes(ctor.GetRuntimeModule(), ctor.MetadataToken, pcaCount, caType, !AllowCriticalCustomAttributes(ctor));
            if (pcaCount > 0) Array.Copy(pca, 0, attributes, attributes.Length - pcaCount, pcaCount); 
            return attributes; 
        }
 
        [System.Security.SecuritySafeCritical]  // auto-generated
        internal static Object[] GetCustomAttributes(RuntimePropertyInfo property, RuntimeType caType)
        {
            Contract.Requires(property != null); 
            Contract.Requires(caType != null);
 
            int pcaCount = 0; 
            Attribute[] pca = PseudoCustomAttribute.GetCustomAttributes(property, caType, out pcaCount);
            // Since properties and events have no transparency state, logically we should check the declaring types. 
            // But then if someone wanted to apply critical attributes on a property/event he would need to make the type critical,
            // which would also implicitly made all the members critical.
            // So we check the containing assembly instead. If the assembly can contain critical code we allow critical attributes on properties/events.
            bool disallowCriticalCustomAttributes = property.GetRuntimeModule().GetRuntimeAssembly().IsAllSecurityTransparent(); 

            object[] attributes = GetCustomAttributes(property.GetRuntimeModule(), property.MetadataToken, pcaCount, caType, disallowCriticalCustomAttributes); 
            if (pcaCount > 0) Array.Copy(pca, 0, attributes, attributes.Length - pcaCount, pcaCount); 
            return attributes;
        } 

        [System.Security.SecuritySafeCritical]  // auto-generated
        internal static Object[] GetCustomAttributes(RuntimeEventInfo e, RuntimeType caType)
        { 
            Contract.Requires(e != null);
            Contract.Requires(caType != null); 
 
            int pcaCount = 0;
            Attribute[] pca = PseudoCustomAttribute.GetCustomAttributes(e, caType, out pcaCount); 
            // Since properties and events have no transparency state, logically we should check the declaring types.
            // But then if someone wanted to apply critical attributes on a property/event he would need to make the type critical,
            // which would also implicitly made all the members critical.
            // So we check the containing assembly instead. If the assembly can contain critical code we allow critical attributes on properties/events. 
            bool disallowCriticalCustomAttributes = e.GetRuntimeModule().GetRuntimeAssembly().IsAllSecurityTransparent();
            object[] attributes = GetCustomAttributes(e.GetRuntimeModule(), e.MetadataToken, pcaCount, caType, disallowCriticalCustomAttributes); 
            if (pcaCount > 0) Array.Copy(pca, 0, attributes, attributes.Length - pcaCount, pcaCount); 
            return attributes;
        } 

        [System.Security.SecuritySafeCritical]  // auto-generated
        internal static Object[] GetCustomAttributes(RuntimeFieldInfo field, RuntimeType caType)
        { 
            Contract.Requires(field != null);
            Contract.Requires(caType != null); 
 
            int pcaCount = 0;
            Attribute[] pca = PseudoCustomAttribute.GetCustomAttributes(field, caType, out pcaCount); 
            object[] attributes = GetCustomAttributes(field.GetRuntimeModule(), field.MetadataToken, pcaCount, caType, !AllowCriticalCustomAttributes(field));
            if (pcaCount > 0) Array.Copy(pca, 0, attributes, attributes.Length - pcaCount, pcaCount);
            return attributes;
        } 

        [System.Security.SecuritySafeCritical]  // auto-generated 
        internal static Object[] GetCustomAttributes(RuntimeParameterInfo parameter, RuntimeType caType) 
        {
            Contract.Requires(parameter != null); 
            Contract.Requires(caType != null);

            int pcaCount = 0;
            Attribute[] pca = PseudoCustomAttribute.GetCustomAttributes(parameter, caType, out pcaCount); 
            object[] attributes = GetCustomAttributes(parameter.GetRuntimeModule(), parameter.MetadataToken, pcaCount, caType, !AllowCriticalCustomAttributes(parameter));
            if (pcaCount > 0) Array.Copy(pca, 0, attributes, attributes.Length - pcaCount, pcaCount); 
            return attributes; 
        }
 
        [System.Security.SecuritySafeCritical]  // auto-generated
        internal static Object[] GetCustomAttributes(RuntimeAssembly assembly, RuntimeType caType)
        {
            Contract.Requires(assembly != null); 
            Contract.Requires(caType != null);
 
            int pcaCount = 0; 
            Attribute[] pca = PseudoCustomAttribute.GetCustomAttributes(assembly, caType, true, out pcaCount);
            int assemblyToken = RuntimeAssembly.GetToken(assembly.GetNativeHandle()); 
            bool isAssemblySecurityTransparent = assembly.IsAllSecurityTransparent();
            object[] attributes = GetCustomAttributes(assembly.ManifestModule as RuntimeModule, assemblyToken, pcaCount, caType, isAssemblySecurityTransparent);
            if (pcaCount > 0) Array.Copy(pca, 0, attributes, attributes.Length - pcaCount, pcaCount);
            return attributes; 
        }
 
        [System.Security.SecuritySafeCritical]  // auto-generated 
        internal static Object[] GetCustomAttributes(RuntimeModule module, RuntimeType caType)
        { 
            Contract.Requires(module != null);
            Contract.Requires(caType != null);

            int pcaCount = 0; 
            Attribute[] pca = PseudoCustomAttribute.GetCustomAttributes(module, caType, out pcaCount);
            bool isModuleSecurityTransparent = module.GetRuntimeAssembly().IsAllSecurityTransparent(); 
            object[] attributes = GetCustomAttributes(module, module.MetadataToken, pcaCount, caType, isModuleSecurityTransparent); 
            if (pcaCount > 0) Array.Copy(pca, 0, attributes, attributes.Length - pcaCount, pcaCount);
            return attributes; 
        }

        [System.Security.SecurityCritical]  // auto-generated
        private static bool IsCustomAttributeDefined( 
            RuntimeModule decoratedModule, int decoratedMetadataToken, RuntimeType attributeFilterType)
        { 
            return IsCustomAttributeDefined(decoratedModule, decoratedMetadataToken, attributeFilterType, false); 
        }
 
        [System.Security.SecurityCritical]  // auto-generated
        private static bool IsCustomAttributeDefined(
            RuntimeModule decoratedModule, int decoratedMetadataToken, RuntimeType attributeFilterType, bool mustBeInheritable)
        { 
            if (decoratedModule.Assembly.ReflectionOnly)
                throw new InvalidOperationException(Environment.GetResourceString("Arg_ReflectionOnlyCA")); 
            Contract.EndContractBlock(); 

            MetadataImport scope = decoratedModule.MetadataImport; 
            CustomAttributeRecord[] car = CustomAttributeData.GetCustomAttributeRecords(decoratedModule, decoratedMetadataToken);
            RuntimeType attributeType;
            IRuntimeMethodInfo ctor;
            bool ctorHasParameters, isVarArg; 

            // Optimization for the case where attributes decorate entities in the same assembly in which case 
            // we can cache the successful APTCA check between the decorated and the declared assembly. 
            Assembly lastAptcaOkAssembly = null;
 
            for (int i = 0; i < car.Length; i++)
            {
                CustomAttributeRecord caRecord = car[i];
 
                if (FilterCustomAttributeRecord(caRecord, scope, ref lastAptcaOkAssembly,
                    decoratedModule, decoratedMetadataToken, attributeFilterType, mustBeInheritable, null, null, 
                    out attributeType, out ctor, out ctorHasParameters, out isVarArg)) 
                    return true;
            } 

            return false;
        }
 
        [System.Security.SecurityCritical]  // auto-generated
        private unsafe static object[] GetCustomAttributes( 
            RuntimeModule decoratedModule, int decoratedMetadataToken, int pcaCount, RuntimeType attributeFilterType, bool isDecoratedTargetSecurityTransparent) 
        {
            return GetCustomAttributes(decoratedModule, decoratedMetadataToken, pcaCount, attributeFilterType, false, null, isDecoratedTargetSecurityTransparent); 
        }

        [System.Security.SecurityCritical]  // auto-generated
        private unsafe static object[] GetCustomAttributes( 
            RuntimeModule decoratedModule, int decoratedMetadataToken, int pcaCount,
            RuntimeType attributeFilterType, bool mustBeInheritable, IList derivedAttributes, bool isDecoratedTargetSecurityTransparent) 
        { 
            if (decoratedModule.Assembly.ReflectionOnly)
                throw new InvalidOperationException(Environment.GetResourceString("Arg_ReflectionOnlyCA")); 
            Contract.EndContractBlock();

            MetadataImport scope = decoratedModule.MetadataImport;
            CustomAttributeRecord[] car = CustomAttributeData.GetCustomAttributeRecords(decoratedModule, decoratedMetadataToken); 

            bool useObjectArray = (attributeFilterType == null || attributeFilterType.IsValueType || attributeFilterType.ContainsGenericParameters); 
            Type arrayType = useObjectArray ? typeof(object) : attributeFilterType; 

            if (attributeFilterType == null && car.Length == 0) 
                return CreateAttributeArrayHelper(arrayType, 0);

            object[] attributes = CreateAttributeArrayHelper(arrayType, car.Length);
            int cAttributes = 0; 

            // Custom attribute security checks are done with respect to the assembly *decorated* with the 
            // custom attribute as opposed to the *caller of GetCustomAttributes*. 
            // Since this assembly might not be on the stack and the attribute ctor or property setters we're about to invoke may
            // make security demands, we push a frame on the stack as a proxy for the decorated assembly (this frame will be picked 
            // up an interpreted by the security stackwalker).
            // Once we push the frame it will be automatically popped in the event of an exception, so no need to use CERs or the
            // like.
            SecurityContextFrame frame = new SecurityContextFrame(); 
            frame.Push(decoratedModule.GetRuntimeAssembly());
 
            // Optimization for the case where attributes decorate entities in the same assembly in which case 
            // we can cache the successful APTCA check between the decorated and the declared assembly.
            Assembly lastAptcaOkAssembly = null; 

            for (int i = 0; i < car.Length; i++)
            {
                object attribute = null; 
                CustomAttributeRecord caRecord = car[i];
 
                IRuntimeMethodInfo ctor = null; 
                RuntimeType attributeType = null;
                bool ctorHasParameters, isVarArg; 
                int cNamedArgs = 0;

                IntPtr blobStart = caRecord.blob.Signature;
                IntPtr blobEnd = (IntPtr)((byte*)blobStart + caRecord.blob.Length); 
                int blobLen = (int)((byte*)blobEnd - (byte*)blobStart);
 
                if (!FilterCustomAttributeRecord(caRecord, scope, ref lastAptcaOkAssembly, 
                                                 decoratedModule, decoratedMetadataToken, attributeFilterType, mustBeInheritable,
                                                 attributes, derivedAttributes, 
                                                 out attributeType, out ctor, out ctorHasParameters, out isVarArg))
                    continue;

                if (ctor != null) 
                {
                    // Linktime demand checks 
                    // decoratedMetadataToken needed as it may be "transparent" in which case we do a full stack walk 
                    RuntimeMethodHandle.CheckLinktimeDemands(ctor, decoratedModule, isDecoratedTargetSecurityTransparent);
                } 
                else
                {
                    //
 

                } 
 
                // Leverage RuntimeConstructorInfo standard .ctor verfication
                RuntimeConstructorInfo.CheckCanCreateInstance(attributeType, isVarArg); 

                // Create custom attribute object
                if (ctorHasParameters)
                { 
                    attribute = CreateCaObject(decoratedModule, ctor, ref blobStart, blobEnd, out cNamedArgs);
                } 
                else 
                {
                    attribute = RuntimeTypeHandle.CreateCaInstance(attributeType, ctor); 

                    // It is allowed by the ECMA spec to have an empty signature blob
                    if (blobLen == 0)
                        cNamedArgs = 0; 
                    else
                    { 
                        // Metadata is always written in little-endian format. Must account for this on 
                        // big-endian platforms.
#if BIGENDIAN 
                        const int CustomAttributeVersion = 0x0100;
#else
                        const int CustomAttributeVersion = 0x0001;
#endif 
                        if (Marshal.ReadInt16(blobStart) != CustomAttributeVersion)
                            throw new CustomAttributeFormatException(); 
                        blobStart = (IntPtr)((byte*)blobStart + 2); // skip version prefix 

                        cNamedArgs = Marshal.ReadInt16(blobStart); 
                        blobStart = (IntPtr)((byte*)blobStart + 2); // skip namedArgs count
#if BIGENDIAN
                        cNamedArgs = ((cNamedArgs & 0xff00) >> 8) | ((cNamedArgs & 0x00ff) << 8);
#endif 
                    }
                } 
 
                for (int j = 0; j < cNamedArgs; j++)
                { 
                    #region // Initialize named properties and fields
                    string name;
                    bool isProperty;
                    RuntimeType type; 
                    object value;
 
                    IntPtr blobItr = caRecord.blob.Signature; 

                    GetPropertyOrFieldData(decoratedModule, ref blobStart, blobEnd, out name, out isProperty, out type, out value); 

                    try
                    {
                        if (isProperty) 
                        {
                            #region // Initialize property 
                            if (type == null && value != null) 
                            {
                                type = (RuntimeType)value.GetType(); 
                                if (type == Type_RuntimeType)
                                    type = Type_Type;
                            }
 
                            RuntimePropertyInfo property = null;
 
                            if (type == null) 
                                property = attributeType.GetProperty(name) as RuntimePropertyInfo;
                            else 
                                property = attributeType.GetProperty(name, type, Type.EmptyTypes) as RuntimePropertyInfo;

                            // Did we get a valid property reference?
                            if (property == null) 
                            {
                                throw new CustomAttributeFormatException( 
                                    String.Format(CultureInfo.CurrentUICulture, Environment.GetResourceString( 
                                        isProperty ? "RFLCT.InvalidPropFail" : "RFLCT.InvalidFieldFail"), name));
                            } 

                            RuntimeMethodInfo setMethod = property.GetSetMethod(true) as RuntimeMethodInfo;

                            // Public properties may have non-public setter methods 
                            if (!setMethod.IsPublic)
                                continue; 
 
                            RuntimeMethodHandle.CheckLinktimeDemands(setMethod, decoratedModule, isDecoratedTargetSecurityTransparent);
 
                            setMethod.Invoke(attribute, BindingFlags.Default, null, new object[] { value }, null, true);
                            #endregion
                        }
                        else 
                        {
                            RtFieldInfo field = attributeType.GetField(name) as RtFieldInfo; 
 
                            if (isDecoratedTargetSecurityTransparent)
                            { 
                                RuntimeFieldHandle.CheckAttributeAccess(field.FieldHandle, decoratedModule.GetNativeHandle());
                            }

                            field.InternalSetValue(attribute, value, BindingFlags.Default, Type.DefaultBinder, null, false); 
                        }
                    } 
                    catch (Exception e) 
                    {
                        throw new CustomAttributeFormatException( 
                            String.Format(CultureInfo.CurrentUICulture, Environment.GetResourceString(
                                isProperty ? "RFLCT.InvalidPropFail" : "RFLCT.InvalidFieldFail"), name), e);
                    }
                    #endregion 
                }
 
                if (!blobStart.Equals(blobEnd)) 
                    throw new CustomAttributeFormatException();
 
                attributes[cAttributes++] = attribute;
            }

            // The frame will be popped automatically if we take an exception any time after we pushed it. So no need of a catch or 
            // finally or CERs here.
            frame.Pop(); 
 
            if (cAttributes == car.Length && pcaCount == 0)
                return attributes; 

            object[] result = CreateAttributeArrayHelper(arrayType, cAttributes + pcaCount);
            Array.Copy(attributes, 0, result, 0, cAttributes);
            return result; 
        }
 
        [System.Security.SecurityCritical]  // auto-generated 
        private unsafe static bool FilterCustomAttributeRecord(
            CustomAttributeRecord caRecord, MetadataImport scope, ref Assembly lastAptcaOkAssembly, 
            RuntimeModule decoratedModule, MetadataToken decoratedToken, RuntimeType attributeFilterType, bool mustBeInheritable,
            object[] attributes, IList derivedAttributes,
            out RuntimeType attributeType, out IRuntimeMethodInfo ctor, out bool ctorHasParameters, out bool isVarArg)
        { 
            ctor = null;
            attributeType = null; 
            ctorHasParameters = false; 
            isVarArg = false;
 
            IntPtr blobStart = caRecord.blob.Signature;
            IntPtr blobEnd = (IntPtr)((byte*)blobStart + caRecord.blob.Length);

            // Resolve attribute type from ctor parent token found in decorated decoratedModule scope 
            attributeType = decoratedModule.ResolveType(scope.GetParentToken(caRecord.tkCtor), null, null) as RuntimeType;
 
            // Test attribute type against user provided attribute type filter 
            if (!(attributeFilterType.IsAssignableFrom(attributeType)))
                return false; 

            // Ensure if attribute type must be inheritable that it is inhertiable
            // Ensure that to consider a duplicate attribute type AllowMultiple is true
            if (!AttributeUsageCheck(attributeType, mustBeInheritable, attributes, derivedAttributes)) 
                return false;
 
#if FEATURE_APTCA 
            // APTCA checks
            RuntimeAssembly attributeAssembly = (RuntimeAssembly)attributeType.Assembly; 
            RuntimeAssembly decoratedModuleAssembly = (RuntimeAssembly)decoratedModule.Assembly;

            if (attributeAssembly != lastAptcaOkAssembly &&
                !RuntimeAssembly.AptcaCheck(attributeAssembly, decoratedModuleAssembly)) 
                return false;
 
            // Cache last successful APTCA check (optimization) 
            lastAptcaOkAssembly = decoratedModuleAssembly;
#endif // FEATURE_APTCA 

            // Resolve the attribute ctor
            ConstArray ctorSig = scope.GetMethodSignature(caRecord.tkCtor);
            isVarArg = (ctorSig[0] & 0x05) != 0; 
            ctorHasParameters = ctorSig[1] != 0;
 
            if (ctorHasParameters) 
            {
                // Resolve method ctor token found in decorated decoratedModule scope 
                ctor = ModuleHandle.ResolveMethodHandleInternal(decoratedModule.GetNativeHandle(), caRecord.tkCtor);
            }
            else
            { 
                // Resolve method ctor token from decorated decoratedModule scope
                ctor = attributeType.GetTypeHandleInternal().GetDefaultConstructor(); 
 
                if (ctor == null && !attributeType.IsValueType)
                    throw new MissingMethodException(".ctor"); 
            }

            // Visibility checks
            if (ctor == null) 
            {
                if (!attributeType.IsVisible && !attributeType.TypeHandle.IsVisibleFromModule(decoratedModule)) 
                    return false; 

                return true; 
            }

            if (RuntimeMethodHandle.IsVisibleFromModule(ctor, decoratedModule))
                return true; 

            MetadataToken tkParent = new MetadataToken(); 
 
            if (decoratedToken.IsParamDef)
            { 
                tkParent = new MetadataToken(scope.GetParentToken(decoratedToken));
                tkParent = new MetadataToken(scope.GetParentToken(tkParent));
            }
            else if (decoratedToken.IsMethodDef || decoratedToken.IsProperty || decoratedToken.IsEvent || decoratedToken.IsFieldDef) 
            {
                tkParent = new MetadataToken(scope.GetParentToken(decoratedToken)); 
            } 
            else if (decoratedToken.IsTypeDef)
            { 
                tkParent = decoratedToken;
            }

            if (tkParent.IsTypeDef) 
                return RuntimeMethodHandle.IsVisibleFromType(ctor, decoratedModule.ModuleHandle.ResolveTypeHandle(tkParent));
 
            return false; 
        }
        #endregion 

        #region Private Static Methods
        [System.Security.SecurityCritical]  // auto-generated
        private static bool AttributeUsageCheck( 
            RuntimeType attributeType, bool mustBeInheritable, object[] attributes, IList derivedAttributes)
        { 
            AttributeUsageAttribute attributeUsageAttribute = null; 

            if (mustBeInheritable) 
            {
                attributeUsageAttribute = CustomAttribute.GetAttributeUsage(attributeType);

                if (!attributeUsageAttribute.Inherited) 
                    return false;
            } 
 
            // Legacy: AllowMultiple ignored for none inheritable attributes
 
            if (derivedAttributes == null)
                return true;

            for (int i = 0; i < derivedAttributes.Count; i++) 
            {
                if (derivedAttributes[i].GetType() == attributeType) 
                { 
                    if (attributeUsageAttribute == null)
                        attributeUsageAttribute = CustomAttribute.GetAttributeUsage(attributeType); 

                    return attributeUsageAttribute.AllowMultiple;
                }
            } 

            return true; 
        } 

        [System.Security.SecurityCritical]  // auto-generated 
        internal static AttributeUsageAttribute GetAttributeUsage(RuntimeType decoratedAttribute)
        {
            RuntimeModule decoratedModule = decoratedAttribute.GetRuntimeModule();
            MetadataImport scope = decoratedModule.MetadataImport; 
            CustomAttributeRecord[] car = CustomAttributeData.GetCustomAttributeRecords(decoratedModule, decoratedAttribute.MetadataToken);
 
            AttributeUsageAttribute attributeUsageAttribute = null; 

            for (int i = 0; i < car.Length; i++) 
            {
                CustomAttributeRecord caRecord = car[i];
                RuntimeType attributeType = decoratedModule.ResolveType(scope.GetParentToken(caRecord.tkCtor), null, null) as RuntimeType;
 
                if (attributeType != (RuntimeType)typeof(AttributeUsageAttribute))
                    continue; 
 
                if (attributeUsageAttribute != null)
                    throw new FormatException(String.Format( 
                        CultureInfo.CurrentUICulture, Environment.GetResourceString("Format_AttributeUsage"), attributeType));

                AttributeTargets targets;
                bool inherited, allowMultiple; 
                ParseAttributeUsageAttribute(caRecord.blob, out targets, out inherited, out allowMultiple);
                attributeUsageAttribute = new AttributeUsageAttribute(targets, allowMultiple, inherited); 
            } 

            if (attributeUsageAttribute == null) 
                return AttributeUsageAttribute.Default;

            return attributeUsageAttribute;
        } 
        #endregion
 
        #region Private Static FCalls 
        [System.Security.SecurityCritical]  // auto-generated
        [ResourceExposure(ResourceScope.None)] 
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        private static extern void _ParseAttributeUsageAttribute(
            IntPtr pCa, int cCa, out int targets, out bool inherited, out bool allowMultiple);
        [System.Security.SecurityCritical]  // auto-generated 
        private static void ParseAttributeUsageAttribute(
            ConstArray ca, out AttributeTargets targets, out bool inherited, out bool allowMultiple) 
        { 
            int _targets;
            _ParseAttributeUsageAttribute(ca.Signature, ca.Length, out _targets, out inherited, out allowMultiple); 
            targets = (AttributeTargets)_targets;
        }

        [System.Security.SecurityCritical]  // auto-generated 
        [ResourceExposure(ResourceScope.None)]
        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        private static unsafe extern Object _CreateCaObject(RuntimeModule pModule, IRuntimeMethodInfo pCtor, byte** ppBlob, byte* pEndBlob, int* pcNamedArgs); 
        [System.Security.SecurityCritical]  // auto-generated
        private static unsafe Object CreateCaObject(RuntimeModule module, IRuntimeMethodInfo ctor, ref IntPtr blob, IntPtr blobEnd, out int namedArgs) 
        {
            byte* pBlob = (byte*)blob;
            byte* pBlobEnd = (byte*)blobEnd;
            int cNamedArgs; 
            object ca = _CreateCaObject(module, ctor, &pBlob, pBlobEnd, &cNamedArgs);
            blob = (IntPtr)pBlob; 
            namedArgs = cNamedArgs; 
            return ca;
        } 

        [System.Security.SecurityCritical]  // auto-generated
        [ResourceExposure(ResourceScope.None)]
        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        private unsafe extern static void _GetPropertyOrFieldData(
            RuntimeModule pModule, byte** ppBlobStart, byte* pBlobEnd, out string name, out bool bIsProperty, out RuntimeType type, out object value); 
        [System.Security.SecurityCritical]  // auto-generated 
        private unsafe static void GetPropertyOrFieldData(
            RuntimeModule module, ref IntPtr blobStart, IntPtr blobEnd, out string name, out bool isProperty, out RuntimeType type, out object value) 
        {
            byte* pBlobStart = (byte*)blobStart;
            _GetPropertyOrFieldData(
                module.GetNativeHandle(), &pBlobStart, (byte*)blobEnd, out name, out isProperty, out type, out value); 
            blobStart = (IntPtr)pBlobStart;
        } 
 
        [System.Security.SecuritySafeCritical]
        private static object[] CreateAttributeArrayHelper(Type elementType, int elementCount) 
        {
            return (object[])Array.UnsafeCreateInstance(elementType, elementCount);
        }
        #endregion 
    }
 
    internal static class PseudoCustomAttribute 
    {
        #region Private Static Data Members 
        // Here we can avoid the need to take a lock when using Dictionary by rearranging
        // the only method that adds values to the Dictionary. For more details on
        // Dictionary versus Hashtable thread safety:
        // See code:Dictionary#DictionaryVersusHashtableThreadSafety 
        private static Dictionary s_pca;
        private static int s_pcasCount; 
        #endregion 

        #region FCalls 
        [System.Security.SecurityCritical]  // auto-generated
        [ResourceExposure(ResourceScope.None)]
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        unsafe private static extern void _GetSecurityAttributes(RuntimeModule module, int token, bool assembly, out object[] securityAttributes); 
        [System.Security.SecurityCritical]  // auto-generated
        unsafe internal static void GetSecurityAttributes(RuntimeModule module, int token, bool assembly, out object[] securityAttributes) 
        { 
            _GetSecurityAttributes(module.GetNativeHandle(), token, assembly, out securityAttributes);
        } 
        #endregion

        #region Static Constructor
        [System.Security.SecurityCritical]  // auto-generated 
        static PseudoCustomAttribute()
        { 
            RuntimeType[] pcas = new RuntimeType[] 
            {
                // See //depot/DevDiv/private/Main/ndp/clr/src/MD/Compiler/CustAttr.cpp 
                typeof(FieldOffsetAttribute) as RuntimeType, // field
#if FEATURE_SERIALIZATION
                typeof(SerializableAttribute) as RuntimeType, // class, struct, enum, delegate
#endif 
                typeof(MarshalAsAttribute) as RuntimeType, // parameter, field, return-value
                typeof(ComImportAttribute) as RuntimeType, // class, interface 
#if FEATURE_SERIALIZATION 
                typeof(NonSerializedAttribute) as RuntimeType, // field, inherited
#endif 
                typeof(InAttribute) as RuntimeType, // parameter
                typeof(OutAttribute) as RuntimeType, // parameter
                typeof(OptionalAttribute) as RuntimeType, // parameter
                typeof(DllImportAttribute) as RuntimeType, // method 
                typeof(PreserveSigAttribute) as RuntimeType, // method
                typeof(TypeForwardedToAttribute) as RuntimeType, // assembly 
            }; 

            s_pcasCount = pcas.Length; 
            Dictionary temp_pca = new Dictionary(s_pcasCount);

            for (int i = 0; i < s_pcasCount; i++)
            { 
                VerifyPseudoCustomAttribute(pcas[i]);
                temp_pca[pcas[i]] = pcas[i]; 
            } 
            s_pca = temp_pca;
        } 

        [System.Security.SecurityCritical]  // auto-generated
        [Conditional("_DEBUG")]
        private static void VerifyPseudoCustomAttribute(RuntimeType pca) 
        {
            // If any of these are invariants are no longer true will have to 
            // re-architect the PCA product logic and test cases -- you've been warned! 
            Contract.Assert(pca.BaseType == (RuntimeType)typeof(Attribute), "Pseudo CA Error");
            AttributeUsageAttribute usage = CustomAttribute.GetAttributeUsage(pca); 
            Contract.Assert(usage.Inherited == false, "Pseudo CA Error");
            //AllowMultiple is true for TypeForwardedToAttribute
            //Contract.Assert(usage.AllowMultiple == false, "Pseudo CA Error");
        } 
        #endregion
 
        #region Internal Static 
        internal static bool IsSecurityAttribute(RuntimeType type)
        { 
            return type == (RuntimeType)typeof(SecurityAttribute) || type.IsSubclassOf(typeof(SecurityAttribute));
        }

        [System.Security.SecurityCritical]  // auto-generated 
        internal static Attribute[] GetCustomAttributes(RuntimeType type, RuntimeType caType, bool includeSecCa, out int count)
        { 
            Contract.Requires(type != null); 
            Contract.Requires(caType != null);
 
            count = 0;

            bool all = caType == (RuntimeType)typeof(object) || caType == (RuntimeType)typeof(Attribute);
            if (!all && s_pca.GetValueOrDefault(caType) == null && !IsSecurityAttribute(caType)) 
                return new Attribute[0];
 
            List pcas = new List(); 
            Attribute pca = null;
 
#if FEATURE_SERIALIZATION
            if (all || caType == (RuntimeType)typeof(SerializableAttribute))
            {
                pca = SerializableAttribute.GetCustomAttribute(type); 
                if (pca != null) pcas.Add(pca);
            } 
#endif 
            if (all || caType == (RuntimeType)typeof(ComImportAttribute))
            { 
                pca = ComImportAttribute.GetCustomAttribute(type);
                if (pca != null) pcas.Add(pca);
            }
            if (includeSecCa && (all || IsSecurityAttribute(caType))) 
            {
                if (!type.IsGenericParameter && type.GetElementType() == null) 
                { 
                    if (type.IsGenericType)
                        type = (RuntimeType)type.GetGenericTypeDefinition(); 

                    object[] securityAttributes;
                    GetSecurityAttributes(type.Module.ModuleHandle.GetRuntimeModule(), type.MetadataToken, false, out securityAttributes);
                    if (securityAttributes != null) 
                        foreach (object a in securityAttributes)
                            if (caType == a.GetType() || a.GetType().IsSubclassOf(caType)) 
                                pcas.Add((Attribute)a); 
                }
            } 

            count = pcas.Count;
            return pcas.ToArray();
        } 
        [System.Security.SecurityCritical]  // auto-generated
        internal static bool IsDefined(RuntimeType type, RuntimeType caType) 
        { 
            bool all = caType == (RuntimeType)typeof(object) || caType == (RuntimeType)typeof(Attribute);
            if (!all && s_pca.GetValueOrDefault(caType) == null && !IsSecurityAttribute(caType)) 
                return false;

#if FEATURE_SERIALIZATION
            if (all || caType == (RuntimeType)typeof(SerializableAttribute)) 
            {
                if (SerializableAttribute.IsDefined(type)) return true; 
            } 
#endif
            if (all || caType == (RuntimeType)typeof(ComImportAttribute)) 
            {
                if (ComImportAttribute.IsDefined(type)) return true;
            }
            if (all || IsSecurityAttribute(caType)) 
            {
                int count; 
                if (GetCustomAttributes(type, caType, true, out count).Length != 0) 
                    return true;
            } 

            return false;
        }
 
        [System.Security.SecurityCritical]  // auto-generated
        internal static Attribute[] GetCustomAttributes(RuntimeMethodInfo method, RuntimeType caType, bool includeSecCa, out int count) 
        { 
            Contract.Requires(method != null);
            Contract.Requires(caType != null); 

            count = 0;

            bool all = caType == (RuntimeType)typeof(object) || caType == (RuntimeType)typeof(Attribute); 
            if (!all && s_pca.GetValueOrDefault(caType) == null && !IsSecurityAttribute(caType))
                return new Attribute[0]; 
 
            List pcas = new List();
            Attribute pca = null; 

            if (all || caType == (RuntimeType)typeof(DllImportAttribute))
            {
                pca = DllImportAttribute.GetCustomAttribute(method); 
                if (pca != null) pcas.Add(pca);
            } 
            if (all || caType == (RuntimeType)typeof(PreserveSigAttribute)) 
            {
                pca = PreserveSigAttribute.GetCustomAttribute(method); 
                if (pca != null) pcas.Add(pca);
            }
            if (includeSecCa && (all || IsSecurityAttribute(caType)))
            { 
                object[] securityAttributes;
 
                GetSecurityAttributes(method.Module.ModuleHandle.GetRuntimeModule(), method.MetadataToken, false, out securityAttributes); 
                if (securityAttributes != null)
                    foreach (object a in securityAttributes) 
                        if (caType == a.GetType() || a.GetType().IsSubclassOf(caType))
                            pcas.Add((Attribute)a);
            }
 
            count = pcas.Count;
            return pcas.ToArray(); 
        } 
        [System.Security.SecurityCritical]  // auto-generated
        internal static bool IsDefined(RuntimeMethodInfo method, RuntimeType caType) 
        {
            bool all = caType == (RuntimeType)typeof(object) || caType == (RuntimeType)typeof(Attribute);
            if (!all && s_pca.GetValueOrDefault(caType) == null)
                return false; 

            if (all || caType == (RuntimeType)typeof(DllImportAttribute)) 
            { 
                if (DllImportAttribute.IsDefined(method)) return true;
            } 
            if (all || caType == (RuntimeType)typeof(PreserveSigAttribute))
            {
                if (PreserveSigAttribute.IsDefined(method)) return true;
            } 
            if (all || IsSecurityAttribute(caType))
            { 
                int count; 

                if (GetCustomAttributes(method, caType, true, out count).Length != 0) 
                    return true;
            }

            return false; 
        }
 
        [System.Security.SecurityCritical]  // auto-generated 
        internal static Attribute[] GetCustomAttributes(RuntimeParameterInfo parameter, RuntimeType caType, out int count)
        { 
            Contract.Requires(parameter != null);
            Contract.Requires(caType != null);

            count = 0; 

            bool all = caType == (RuntimeType)typeof(object) || caType == (RuntimeType)typeof(Attribute); 
            if (!all && s_pca.GetValueOrDefault(caType) == null) 
                return null;
 
            Attribute[] pcas = new Attribute[s_pcasCount];
            Attribute pca = null;

            if (all || caType == (RuntimeType)typeof(InAttribute)) 
            {
                pca = InAttribute.GetCustomAttribute(parameter); 
                if (pca != null) pcas[count++] = pca; 
            }
            if (all || caType == (RuntimeType)typeof(OutAttribute)) 
            {
                pca = OutAttribute.GetCustomAttribute(parameter);
                if (pca != null) pcas[count++] = pca;
            } 
            if (all || caType == (RuntimeType)typeof(OptionalAttribute))
            { 
                pca = OptionalAttribute.GetCustomAttribute(parameter); 
                if (pca != null) pcas[count++] = pca;
            } 
            if (all || caType == (RuntimeType)typeof(MarshalAsAttribute))
            {
                pca = MarshalAsAttribute.GetCustomAttribute(parameter);
                if (pca != null) pcas[count++] = pca; 
            }
            return pcas; 
        } 
        [System.Security.SecurityCritical]  // auto-generated
        internal static bool IsDefined(RuntimeParameterInfo parameter, RuntimeType caType) 
        {
            bool all = caType == (RuntimeType)typeof(object) || caType == (RuntimeType)typeof(Attribute);
            if (!all && s_pca.GetValueOrDefault(caType) == null)
                return false; 

 
            if (all || caType == (RuntimeType)typeof(InAttribute)) 
            {
                if (InAttribute.IsDefined(parameter)) return true; 
            }
            if (all || caType == (RuntimeType)typeof(OutAttribute))
            {
                if (OutAttribute.IsDefined(parameter)) return true; 
            }
            if (all || caType == (RuntimeType)typeof(OptionalAttribute)) 
            { 
                if (OptionalAttribute.IsDefined(parameter)) return true;
            } 
            if (all || caType == (RuntimeType)typeof(MarshalAsAttribute))
            {
                if (MarshalAsAttribute.IsDefined(parameter)) return true;
            } 

            return false; 
        } 

        [System.Security.SecurityCritical]  // auto-generated 
        internal static Attribute[] GetCustomAttributes(RuntimeAssembly assembly, RuntimeType caType, bool includeSecCa, out int count)
        {
            count = 0;
 
            bool all = caType == (RuntimeType)typeof(object) || caType == (RuntimeType)typeof(Attribute);
 
            if (!all && s_pca.GetValueOrDefault(caType) == null && !IsSecurityAttribute(caType)) 
                return new Attribute[0];
 
            List pcas = new List();
            if (includeSecCa && (all || IsSecurityAttribute(caType)))
            {
                object[] securityAttributes; 

                GetSecurityAttributes(assembly.ManifestModule.ModuleHandle.GetRuntimeModule(), RuntimeAssembly.GetToken(assembly.GetNativeHandle()), true, out securityAttributes); 
                if (securityAttributes != null) 
                    foreach (object a in securityAttributes)
                        if (caType == a.GetType() || a.GetType().IsSubclassOf(caType)) 
                            pcas.Add((Attribute)a);
            }

            //TypeForwardedToAttribute.GetCustomAttribute(assembly) throws FileNotFoundException if the forwarded-to 
            //assemblies are not present. This breaks many V4 scenarios because some framework types are forwarded
            //to assemblies not included in the client SKU. Let's omit TypeForwardedTo for now until we have a better solution. 
 
            //if (all || caType == (RuntimeType)typeof(TypeForwardedToAttribute))
            //{ 
            //    TypeForwardedToAttribute[] attrs = TypeForwardedToAttribute.GetCustomAttribute(assembly);
            //    pcas.AddRange(attrs);
            //}
 
            count = pcas.Count;
            return pcas.ToArray(); 
        } 
        [System.Security.SecurityCritical]  // auto-generated
        internal static bool IsDefined(RuntimeAssembly assembly, RuntimeType caType) 
        {
            int count;
            return GetCustomAttributes(assembly, caType, true, out count).Length > 0;
        } 

        internal static Attribute[] GetCustomAttributes(RuntimeModule module, RuntimeType caType, out int count) 
        { 
            count = 0;
            return null; 
        }
        internal static bool IsDefined(RuntimeModule module, RuntimeType caType)
        {
            return false; 
        }
 
        [System.Security.SecurityCritical]  // auto-generated 
        internal static Attribute[] GetCustomAttributes(RuntimeFieldInfo field, RuntimeType caType, out int count)
        { 
            Contract.Requires(field != null);
            Contract.Requires(caType != null);

            count = 0; 

            bool all = caType == (RuntimeType)typeof(object) || caType == (RuntimeType)typeof(Attribute); 
            if (!all && s_pca.GetValueOrDefault(caType) == null) 
                return null;
 
            Attribute[] pcas = new Attribute[s_pcasCount];
            Attribute pca = null;

            if (all || caType == (RuntimeType)typeof(MarshalAsAttribute)) 
            {
                pca = MarshalAsAttribute.GetCustomAttribute(field); 
                if (pca != null) pcas[count++] = pca; 
            }
            if (all || caType == (RuntimeType)typeof(FieldOffsetAttribute)) 
            {
                pca = FieldOffsetAttribute.GetCustomAttribute(field);
                if (pca != null) pcas[count++] = pca;
            } 
#if FEATURE_SERIALIZATION
            if (all || caType == (RuntimeType)typeof(NonSerializedAttribute)) 
            { 
                pca = NonSerializedAttribute.GetCustomAttribute(field);
                if (pca != null) pcas[count++] = pca; 
            }
#endif
            return pcas;
        } 
        [System.Security.SecurityCritical]  // auto-generated
        internal static bool IsDefined(RuntimeFieldInfo field, RuntimeType caType) 
        { 
            bool all = caType == (RuntimeType)typeof(object) || caType == (RuntimeType)typeof(Attribute);
            if (!all && s_pca.GetValueOrDefault(caType) == null) 
                return false;

            if (all || caType == (RuntimeType)typeof(MarshalAsAttribute))
            { 
                if (MarshalAsAttribute.IsDefined(field)) return true;
            } 
            if (all || caType == (RuntimeType)typeof(FieldOffsetAttribute)) 
            {
                if (FieldOffsetAttribute.IsDefined(field)) return true; 
            }
#if FEATURE_SERIALIZATION
            if (all || caType == (RuntimeType)typeof(NonSerializedAttribute))
            { 
                if (NonSerializedAttribute.IsDefined(field)) return true;
            } 
#endif 

            return false; 
        }

        [System.Security.SecurityCritical]  // auto-generated
        internal static Attribute[] GetCustomAttributes(RuntimeConstructorInfo ctor, RuntimeType caType, bool includeSecCa, out int count) 
        {
            count = 0; 
 
            bool all = caType == (RuntimeType)typeof(object) || caType == (RuntimeType)typeof(Attribute);
 
            if (!all && s_pca.GetValueOrDefault(caType) == null && !IsSecurityAttribute(caType))
                return new Attribute[0];

            List pcas = new List(); 

            if (includeSecCa && (all || IsSecurityAttribute(caType))) 
            { 
                object[] securityAttributes;
 
                GetSecurityAttributes(ctor.Module.ModuleHandle.GetRuntimeModule(), ctor.MetadataToken, false, out securityAttributes);
                if (securityAttributes != null)
                    foreach (object a in securityAttributes)
                        if (caType == a.GetType() || a.GetType().IsSubclassOf(caType)) 
                            pcas.Add((Attribute)a);
            } 
 
            count = pcas.Count;
            return pcas.ToArray(); 
        }
        [System.Security.SecurityCritical]  // auto-generated
        internal static bool IsDefined(RuntimeConstructorInfo ctor, RuntimeType caType)
        { 
            bool all = caType == (RuntimeType)typeof(object) || caType == (RuntimeType)typeof(Attribute);
 
            if (!all && s_pca.GetValueOrDefault(caType) == null) 
                return false;
 
            if (all || IsSecurityAttribute(caType))
            {
                int count;
 
                if (GetCustomAttributes(ctor, caType, true, out count).Length != 0)
                    return true; 
            } 

            return false; 
        }

        internal static Attribute[] GetCustomAttributes(RuntimePropertyInfo property, RuntimeType caType, out int count)
        { 
            count = 0;
            return null; 
        } 
        internal static bool IsDefined(RuntimePropertyInfo property, RuntimeType caType)
        { 
            return false;
        }

        internal static Attribute[] GetCustomAttributes(RuntimeEventInfo e, RuntimeType caType, out int count) 
        {
            count = 0; 
            return null; 
        }
        internal static bool IsDefined(RuntimeEventInfo e, RuntimeType caType) 
        {
            return false;
        }
        #endregion 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
// [....]
// 
 
using System;
using System.Runtime.CompilerServices; 
using System.Runtime.InteropServices;
using System.Collections;
using System.Collections.Generic;
using System.Resources; 
using System.Diagnostics;
using System.Globalization; 
using System.Security; 
using System.Security.Permissions;
using System.Runtime.ConstrainedExecution; 
using System.Runtime.Versioning;
using System.Diagnostics.Contracts;

namespace System.Reflection 
{
    [Serializable] 
    [System.Runtime.InteropServices.ComVisible(true)] 
    public class CustomAttributeData
    { 
        #region Public Static Members
        [System.Security.SecuritySafeCritical]  // auto-generated
        public static IList GetCustomAttributes(MemberInfo target)
        { 
            if (target == null)
                throw new ArgumentNullException("target"); 
 
            return target.GetCustomAttributesData();
        } 

        [System.Security.SecuritySafeCritical]  // auto-generated
        public static IList GetCustomAttributes(Module target)
        { 
            if (target == null)
                throw new ArgumentNullException("target"); 
            Contract.EndContractBlock(); 

            return target.GetCustomAttributesData(); 
        }

        [System.Security.SecuritySafeCritical]  // auto-generated
        public static IList GetCustomAttributes(Assembly target) 
        {
            if (target == null) 
                throw new ArgumentNullException("target"); 
            Contract.EndContractBlock();
 
            return target.GetCustomAttributesData();
        }

        [System.Security.SecuritySafeCritical]  // auto-generated 
        public static IList GetCustomAttributes(ParameterInfo target)
        { 
            if (target == null) 
                throw new ArgumentNullException("target");
            Contract.EndContractBlock(); 

            return target.GetCustomAttributesData();
        }
        #endregion 

        #region Internal Static Members 
        [System.Security.SecuritySafeCritical]  // auto-generated 
        internal static IList GetCustomAttributesInternal(RuntimeType target)
        { 
            Contract.Assert(target != null);

            IList cad = GetCustomAttributes(target.GetRuntimeModule(), target.MetadataToken);
 
            int pcaCount = 0;
            Attribute[] a = PseudoCustomAttribute.GetCustomAttributes((RuntimeType)target, typeof(object) as RuntimeType, true, out pcaCount); 
 
            if (pcaCount == 0)
                return cad; 

            CustomAttributeData[] pca = new CustomAttributeData[cad.Count + pcaCount];
            cad.CopyTo(pca, pcaCount);
            for (int i = 0; i < pcaCount; i++) 
            {
                pca[i] = new CustomAttributeData(a[i]); 
            } 

            return Array.AsReadOnly(pca); 
        }

        [System.Security.SecuritySafeCritical]  // auto-generated
        internal static IList GetCustomAttributesInternal(RuntimeFieldInfo target) 
        {
            Contract.Assert(target != null); 
 
            IList cad = GetCustomAttributes(target.GetRuntimeModule(), target.MetadataToken);
 
            int pcaCount = 0;
            Attribute[] a = PseudoCustomAttribute.GetCustomAttributes((RuntimeFieldInfo)target, typeof(object) as RuntimeType, out pcaCount);

            if (pcaCount == 0) 
                return cad;
 
            CustomAttributeData[] pca = new CustomAttributeData[cad.Count + pcaCount]; 
            cad.CopyTo(pca, pcaCount);
            for (int i = 0; i < pcaCount; i++) 
            {
                pca[i] = new CustomAttributeData(a[i]);
            }
 
            return Array.AsReadOnly(pca);
        } 
 
        [System.Security.SecuritySafeCritical]  // auto-generated
        internal static IList GetCustomAttributesInternal(RuntimeMethodInfo target) 
        {
            Contract.Assert(target != null);

            IList cad = GetCustomAttributes(target.GetRuntimeModule(), target.MetadataToken); 

            int pcaCount = 0; 
            Attribute[] a = PseudoCustomAttribute.GetCustomAttributes((RuntimeMethodInfo)target, typeof(object) as RuntimeType, true, out pcaCount); 

            if (pcaCount == 0) 
                return cad;

            CustomAttributeData[] pca = new CustomAttributeData[cad.Count + pcaCount];
            cad.CopyTo(pca, pcaCount); 
            for (int i = 0; i < pcaCount; i++)
            { 
                pca[i] = new CustomAttributeData(a[i]); 
            }
 
            return Array.AsReadOnly(pca);
        }

        [System.Security.SecuritySafeCritical]  // auto-generated 
        internal static IList GetCustomAttributesInternal(RuntimeConstructorInfo target)
        { 
            Contract.Assert(target != null); 

            return GetCustomAttributes(target.GetRuntimeModule(), target.MetadataToken); 
        }

        [System.Security.SecuritySafeCritical]  // auto-generated
        internal static IList GetCustomAttributesInternal(RuntimeEventInfo target) 
        {
            Contract.Assert(target != null); 
 
            return GetCustomAttributes(target.GetRuntimeModule(), target.MetadataToken);
        } 

        [System.Security.SecuritySafeCritical]  // auto-generated
        internal static IList GetCustomAttributesInternal(RuntimePropertyInfo target)
        { 
            Contract.Assert(target != null);
 
            return GetCustomAttributes(target.GetRuntimeModule(), target.MetadataToken); 
        }
 
        [System.Security.SecuritySafeCritical]  // auto-generated
        internal static IList GetCustomAttributesInternal(RuntimeModule target)
        {
            Contract.Assert(target != null); 

            if (target.IsResource()) 
                return new List(); 

            return GetCustomAttributes(target, target.MetadataToken); 
        }

        [System.Security.SecuritySafeCritical]  // auto-generated
        internal static IList GetCustomAttributesInternal(RuntimeAssembly target) 
        {
            Contract.Assert(target != null); 
 
            IList cad = GetCustomAttributes((RuntimeModule)target.ManifestModule, RuntimeAssembly.GetToken(target.GetNativeHandle()));
 
            int pcaCount = 0;
            Attribute[] a = PseudoCustomAttribute.GetCustomAttributes(target, typeof(object) as RuntimeType, false, out pcaCount);

            if (pcaCount == 0) 
                return cad;
 
            CustomAttributeData[] pca = new CustomAttributeData[cad.Count + pcaCount]; 
            cad.CopyTo(pca, pcaCount);
            for (int i = 0; i < pcaCount; i++) 
            {
                pca[i] = new CustomAttributeData(a[i]);
            }
 
            return Array.AsReadOnly(pca);
        } 
 
        [System.Security.SecuritySafeCritical]  // auto-generated
        internal static IList GetCustomAttributesInternal(RuntimeParameterInfo target) 
        {
            Contract.Assert(target != null);

            IList cad = GetCustomAttributes(target.GetRuntimeModule(), target.MetadataToken); 

            int pcaCount = 0; 
            Attribute[] a = PseudoCustomAttribute.GetCustomAttributes(target, typeof(object) as RuntimeType, out pcaCount); 

            if (pcaCount == 0) 
                return cad;

            CustomAttributeData[] pca = new CustomAttributeData[cad.Count + pcaCount];
            cad.CopyTo(pca, pcaCount); 
            for (int i = 0; i < pcaCount; i++)
                pca[i] = new CustomAttributeData(a[i]); 
 
            return Array.AsReadOnly(pca);
        } 
        #endregion

        #region Private Static Methods
        private static CustomAttributeEncoding TypeToCustomAttributeEncoding(RuntimeType type) 
        {
            if (type == (RuntimeType)typeof(int)) 
                return CustomAttributeEncoding.Int32; 

            if (type.IsEnum) 
                return CustomAttributeEncoding.Enum;

            if (type == (RuntimeType)typeof(string))
                return CustomAttributeEncoding.String; 

            if (type == (RuntimeType)typeof(Type)) 
                return CustomAttributeEncoding.Type; 

            if (type == (RuntimeType)typeof(object)) 
                return CustomAttributeEncoding.Object;

            if (type.IsArray)
                return CustomAttributeEncoding.Array; 

            if (type == (RuntimeType)typeof(char)) 
                return CustomAttributeEncoding.Char; 

            if (type == (RuntimeType)typeof(bool)) 
                return CustomAttributeEncoding.Boolean;

            if (type == (RuntimeType)typeof(byte))
                return CustomAttributeEncoding.Byte; 

            if (type == (RuntimeType)typeof(sbyte)) 
                return CustomAttributeEncoding.SByte; 

            if (type == (RuntimeType)typeof(short)) 
                return CustomAttributeEncoding.Int16;

            if (type == (RuntimeType)typeof(ushort))
                return CustomAttributeEncoding.UInt16; 

            if (type == (RuntimeType)typeof(uint)) 
                return CustomAttributeEncoding.UInt32; 

            if (type == (RuntimeType)typeof(long)) 
                return CustomAttributeEncoding.Int64;

            if (type == (RuntimeType)typeof(ulong))
                return CustomAttributeEncoding.UInt64; 

            if (type == (RuntimeType)typeof(float)) 
                return CustomAttributeEncoding.Float; 

            if (type == (RuntimeType)typeof(double)) 
                return CustomAttributeEncoding.Double;

            // System.Enum is neither an Enum nor a Class
            if (type == (RuntimeType)typeof(Enum)) 
                return CustomAttributeEncoding.Object;
 
            if (type.IsClass) 
                return CustomAttributeEncoding.Object;
 
            if (type.IsInterface)
                return CustomAttributeEncoding.Object;

            if (type.IsValueType) 
                return CustomAttributeEncoding.Undefined;
 
            throw new ArgumentException(Environment.GetResourceString("Argument_InvalidKindOfTypeForCA"), "type"); 
        }
        private static CustomAttributeType InitCustomAttributeType(RuntimeType parameterType) 
        {
            CustomAttributeEncoding encodedType = CustomAttributeData.TypeToCustomAttributeEncoding(parameterType);
            CustomAttributeEncoding encodedArrayType = CustomAttributeEncoding.Undefined;
            CustomAttributeEncoding encodedEnumType = CustomAttributeEncoding.Undefined; 
            string enumName = null;
 
            if (encodedType == CustomAttributeEncoding.Array) 
            {
                parameterType = (RuntimeType)parameterType.GetElementType(); 
                encodedArrayType = CustomAttributeData.TypeToCustomAttributeEncoding(parameterType);
            }

            if (encodedType == CustomAttributeEncoding.Enum || encodedArrayType == CustomAttributeEncoding.Enum) 
            {
                encodedEnumType = TypeToCustomAttributeEncoding((RuntimeType)Enum.GetUnderlyingType(parameterType)); 
                enumName = parameterType.AssemblyQualifiedName; 
            }
 
            return new CustomAttributeType(encodedType, encodedArrayType, encodedEnumType, enumName);
        }
        [System.Security.SecurityCritical]  // auto-generated
        private static IList GetCustomAttributes(RuntimeModule module, int tkTarget) 
        {
            CustomAttributeRecord[] records = GetCustomAttributeRecords(module, tkTarget); 
 
            CustomAttributeData[] customAttributes = new CustomAttributeData[records.Length];
            for (int i = 0; i < records.Length; i++) 
                customAttributes[i] = new CustomAttributeData(module, records[i]);

            return Array.AsReadOnly(customAttributes);
        } 
        #endregion
 
        #region Internal Static Members 
        [System.Security.SecurityCritical]  // auto-generated
        internal unsafe static CustomAttributeRecord[] GetCustomAttributeRecords(RuntimeModule module, int targetToken) 
        {
            MetadataImport scope = module.MetadataImport;

            int cCustomAttributeTokens = scope.EnumCustomAttributesCount(targetToken); 
            int* tkCustomAttributeTokens = stackalloc int[cCustomAttributeTokens];
            scope.EnumCustomAttributes(targetToken, tkCustomAttributeTokens, cCustomAttributeTokens); 
 
            CustomAttributeRecord[] records = new CustomAttributeRecord[cCustomAttributeTokens];
 
            for (int i = 0; i < cCustomAttributeTokens; i++)
            {
                scope.GetCustomAttributeProps(
                    tkCustomAttributeTokens[i], out records[i].tkCtor.Value, out records[i].blob); 
            }
 
            return records; 
        }
 
        internal static CustomAttributeTypedArgument Filter(IList attrs, Type caType, string name)
        {
            for (int i = 0; i < attrs.Count; i++)
            { 
                if (attrs[i].Constructor.DeclaringType == caType)
                { 
                    IList namedArguments = attrs[i].NamedArguments; 
                    for (int j = 0; j < namedArguments.Count; j++)
                    { 
                        if (namedArguments[j].MemberInfo.Name.Equals(name))
                            return namedArguments[j].TypedValue;
                    }
                } 
            }
 
            return new CustomAttributeTypedArgument(); 
        }
 
        internal static CustomAttributeTypedArgument Filter(IList attrs, Type caType, int parameter)
        {
            for (int i = 0; i < attrs.Count; i++)
            { 
                if (attrs[i].Constructor.DeclaringType == caType)
                { 
                    return attrs[i].ConstructorArguments[parameter]; 
                }
            } 

            return new CustomAttributeTypedArgument();
        }
        #endregion 

        #region Private Data Members 
        private ConstructorInfo m_ctor; 
        private RuntimeModule m_scope;
        private MemberInfo[] m_members; 
        private CustomAttributeCtorParameter[] m_ctorParams;
        private CustomAttributeNamedParameter[] m_namedParams;
        private IList m_typedCtorArgs;
        private IList m_namedArgs; 
        #endregion
 
        #region Constructor 
        [System.Security.SecurityCritical]  // auto-generated
        protected CustomAttributeData() 
        {
        }

        [System.Security.SecuritySafeCritical]  // auto-generated 
        private CustomAttributeData(RuntimeModule scope, CustomAttributeRecord caRecord)
        { 
            m_scope = scope; 
            m_ctor = (RuntimeConstructorInfo)RuntimeType.GetMethodBase(scope, caRecord.tkCtor);
 
            ParameterInfo[] parameters = m_ctor.GetParametersNoCopy();
            m_ctorParams = new CustomAttributeCtorParameter[parameters.Length];
            for (int i = 0; i < parameters.Length; i++)
                m_ctorParams[i] = new CustomAttributeCtorParameter(InitCustomAttributeType((RuntimeType)parameters[i].ParameterType)); 

            FieldInfo[] fields = m_ctor.DeclaringType.GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic); 
            PropertyInfo[] properties = m_ctor.DeclaringType.GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic); 
            m_namedParams = new CustomAttributeNamedParameter[properties.Length + fields.Length];
            for (int i = 0; i < fields.Length; i++) 
                m_namedParams[i] = new CustomAttributeNamedParameter(
                    fields[i].Name, CustomAttributeEncoding.Field, InitCustomAttributeType((RuntimeType)fields[i].FieldType));
            for (int i = 0; i < properties.Length; i++)
                m_namedParams[i + fields.Length] = new CustomAttributeNamedParameter( 
                    properties[i].Name, CustomAttributeEncoding.Property, InitCustomAttributeType((RuntimeType)properties[i].PropertyType));
 
            m_members = new MemberInfo[fields.Length + properties.Length]; 
            fields.CopyTo(m_members, 0);
            properties.CopyTo(m_members, fields.Length); 

            CustomAttributeEncodedArgument.ParseAttributeArguments(caRecord.blob, ref m_ctorParams, ref m_namedParams, m_scope);
        }
        #endregion 

        #region Pseudo Custom Attribute Constructor 
        internal CustomAttributeData(Attribute attribute) 
        {
            if (attribute is DllImportAttribute) 
                Init((DllImportAttribute)attribute);
            else if (attribute is FieldOffsetAttribute)
                Init((FieldOffsetAttribute)attribute);
            else if (attribute is MarshalAsAttribute) 
                Init((MarshalAsAttribute)attribute);
            else if (attribute is TypeForwardedToAttribute) 
                Init((TypeForwardedToAttribute)attribute); 
            else
                Init(attribute); 
        }
        private void Init(DllImportAttribute dllImport)
        {
            Type type = typeof(DllImportAttribute); 
            m_ctor = type.GetConstructors(BindingFlags.Public | BindingFlags.Instance)[0];
            m_typedCtorArgs = Array.AsReadOnly(new CustomAttributeTypedArgument[] 
            { 
                new CustomAttributeTypedArgument(dllImport.Value),
            }); 

            m_namedArgs = Array.AsReadOnly(new CustomAttributeNamedArgument[]
            {
                new CustomAttributeNamedArgument(type.GetField("EntryPoint"), dllImport.EntryPoint), 
                new CustomAttributeNamedArgument(type.GetField("CharSet"), dllImport.CharSet),
                new CustomAttributeNamedArgument(type.GetField("ExactSpelling"), dllImport.ExactSpelling), 
                new CustomAttributeNamedArgument(type.GetField("SetLastError"), dllImport.SetLastError), 
                new CustomAttributeNamedArgument(type.GetField("PreserveSig"), dllImport.PreserveSig),
                new CustomAttributeNamedArgument(type.GetField("CallingConvention"), dllImport.CallingConvention), 
                new CustomAttributeNamedArgument(type.GetField("BestFitMapping"), dllImport.BestFitMapping),
                new CustomAttributeNamedArgument(type.GetField("ThrowOnUnmappableChar"), dllImport.ThrowOnUnmappableChar)

            }); 
        }
        private void Init(FieldOffsetAttribute fieldOffset) 
        { 
            m_ctor = typeof(FieldOffsetAttribute).GetConstructors(BindingFlags.Public | BindingFlags.Instance)[0];
            m_typedCtorArgs = Array.AsReadOnly(new CustomAttributeTypedArgument[] { 
                new CustomAttributeTypedArgument(fieldOffset.Value)
            });
            m_namedArgs = Array.AsReadOnly(new CustomAttributeNamedArgument[0]);
        } 
        private void Init(MarshalAsAttribute marshalAs)
        { 
            Type type = typeof(MarshalAsAttribute); 
            m_ctor = type.GetConstructors(BindingFlags.Public | BindingFlags.Instance)[0];
            m_typedCtorArgs = Array.AsReadOnly(new CustomAttributeTypedArgument[] 
            {
                new CustomAttributeTypedArgument(marshalAs.Value),
            });
 
            int i = 3; // ArraySubType, SizeParamIndex, SizeConst
            if (marshalAs.MarshalType != null) i++; 
            if (marshalAs.MarshalTypeRef != null) i++; 
            if (marshalAs.MarshalCookie != null) i++;
#if FEATURE_COMINTEROP 
            i++; // IidParameterIndex
            i++; // SafeArraySubType
            if (marshalAs.SafeArrayUserDefinedSubType != null) i++;
#endif // FEATURE_COMINTEROP 
            CustomAttributeNamedArgument[] namedArgs = new CustomAttributeNamedArgument[i];
 
            i = 0; 
            namedArgs[i++] = new CustomAttributeNamedArgument(type.GetField("ArraySubType"), marshalAs.ArraySubType);
            namedArgs[i++] = new CustomAttributeNamedArgument(type.GetField("SizeParamIndex"), marshalAs.SizeParamIndex); 
            namedArgs[i++] = new CustomAttributeNamedArgument(type.GetField("SizeConst"), marshalAs.SizeConst);
#if FEATURE_COMINTEROP
            namedArgs[i++] = new CustomAttributeNamedArgument(type.GetField("IidParameterIndex"), marshalAs.IidParameterIndex);
            namedArgs[i++] = new CustomAttributeNamedArgument(type.GetField("SafeArraySubType"), marshalAs.SafeArraySubType); 
#endif // FEATURE_COMINTEROP
            if (marshalAs.MarshalType != null) 
                namedArgs[i++] = new CustomAttributeNamedArgument(type.GetField("MarshalType"), marshalAs.MarshalType); 
            if (marshalAs.MarshalTypeRef != null)
                namedArgs[i++] = new CustomAttributeNamedArgument(type.GetField("MarshalTypeRef"), marshalAs.MarshalTypeRef); 
            if (marshalAs.MarshalCookie != null)
                namedArgs[i++] = new CustomAttributeNamedArgument(type.GetField("MarshalCookie"), marshalAs.MarshalCookie);
#if FEATURE_COMINTEROP
            if (marshalAs.SafeArrayUserDefinedSubType != null) 
                namedArgs[i++] = new CustomAttributeNamedArgument(type.GetField("SafeArrayUserDefinedSubType"), marshalAs.SafeArrayUserDefinedSubType);
#endif // FEATURE_COMINTEROP 
 
            m_namedArgs = Array.AsReadOnly(namedArgs);
        } 
        private void Init(TypeForwardedToAttribute forwardedTo)
        {
            Type type = typeof(TypeForwardedToAttribute);
 
            Type[] sig = new Type[] { typeof(Type) };
            m_ctor = type.GetConstructor(BindingFlags.Public | BindingFlags.Instance, null, sig, null); 
 
            CustomAttributeTypedArgument[] typedArgs = new CustomAttributeTypedArgument[1];
            typedArgs[0] = new CustomAttributeTypedArgument(typeof(Type), forwardedTo.Destination); 
            m_typedCtorArgs = Array.AsReadOnly(typedArgs);

            CustomAttributeNamedArgument[] namedArgs = new CustomAttributeNamedArgument[0];
            m_namedArgs = Array.AsReadOnly(namedArgs); 
        }
        private void Init(object pca) 
        { 
            m_ctor = pca.GetType().GetConstructors(BindingFlags.Public | BindingFlags.Instance)[0];
            m_typedCtorArgs = Array.AsReadOnly(new CustomAttributeTypedArgument[0]); 
            m_namedArgs = Array.AsReadOnly(new CustomAttributeNamedArgument[0]);
        }
        #endregion
 
        #region Object Override
        public override string ToString() 
        { 
            string ctorArgs = "";
            for (int i = 0; i < ConstructorArguments.Count; i ++) 
                ctorArgs += String.Format(CultureInfo.CurrentCulture, i == 0 ? "{0}" : ", {0}", ConstructorArguments[i]);

            string namedArgs = "";
            for (int i = 0; i < NamedArguments.Count; i ++) 
                namedArgs += String.Format(CultureInfo.CurrentCulture, i == 0 && ctorArgs.Length == 0 ? "{0}" : ", {0}", NamedArguments[i]);
 
            return String.Format(CultureInfo.CurrentCulture, "[{0}({1}{2})]", Constructor.DeclaringType.FullName, ctorArgs, namedArgs); 
        }
        public override int GetHashCode() 
        {
            return base.GetHashCode();
        }
        public override bool Equals(object obj) 
        {
            return obj == (object)this; 
        } 
        #endregion
 
        #region Public Members
        [System.Runtime.InteropServices.ComVisible(true)]
        public virtual ConstructorInfo Constructor { get { return m_ctor; } }
 
        [System.Runtime.InteropServices.ComVisible(true)]
        public virtual IList ConstructorArguments 
        { 
            get
            { 
                if (m_typedCtorArgs == null)
                {
                    CustomAttributeTypedArgument[] typedCtorArgs = new CustomAttributeTypedArgument[m_ctorParams.Length];
 
                    for (int i = 0; i < typedCtorArgs.Length; i++)
                    { 
                        CustomAttributeEncodedArgument encodedArg = m_ctorParams[i].CustomAttributeEncodedArgument; 

                        typedCtorArgs[i] = new CustomAttributeTypedArgument(m_scope, m_ctorParams[i].CustomAttributeEncodedArgument); 
                    }

                    m_typedCtorArgs = Array.AsReadOnly(typedCtorArgs);
                } 

                return m_typedCtorArgs; 
            } 
        }
 
        public virtual IList NamedArguments
        {
            get
            { 
                if (m_namedArgs == null)
                { 
                    if (m_namedParams == null) 
                        return null;
 
                    int cNamedArgs = 0;
                    for (int i = 0; i < m_namedParams.Length; i++)
                    {
                        if (m_namedParams[i].EncodedArgument.CustomAttributeType.EncodedType != CustomAttributeEncoding.Undefined) 
                            cNamedArgs++;
                    } 
 
                    CustomAttributeNamedArgument[] namedArgs = new CustomAttributeNamedArgument[cNamedArgs];
 
                    for (int i = 0, j = 0; i < m_namedParams.Length; i++)
                    {
                        if (m_namedParams[i].EncodedArgument.CustomAttributeType.EncodedType != CustomAttributeEncoding.Undefined)
                            namedArgs[j++] = new CustomAttributeNamedArgument( 
                                m_members[i], new CustomAttributeTypedArgument(m_scope, m_namedParams[i].EncodedArgument));
                    } 
 
                    m_namedArgs = Array.AsReadOnly(namedArgs);
                } 

                return m_namedArgs;
            }
        } 
        #endregion
    } 
 
    [Serializable]
    [System.Runtime.InteropServices.ComVisible(true)] 
    public struct CustomAttributeNamedArgument
    {
        #region Public Static Members
        public static bool operator ==(CustomAttributeNamedArgument left, CustomAttributeNamedArgument right) 
        {
            return left.Equals(right); 
        } 
        public static bool operator !=(CustomAttributeNamedArgument left, CustomAttributeNamedArgument right)
        { 
            return !left.Equals(right);
        }
        #endregion
 
        #region Private Data Members
        private MemberInfo m_memberInfo; 
        private CustomAttributeTypedArgument m_value; 
        #endregion
 
        #region Constructor
        public CustomAttributeNamedArgument(MemberInfo memberInfo, object value)
        {
            if (memberInfo == null) 
                throw new ArgumentNullException("memberInfo");
 
            Type type = null; 
            FieldInfo field = memberInfo as FieldInfo;
            PropertyInfo property = memberInfo as PropertyInfo; 

            if (field != null)
                type = field.FieldType;
            else if (property != null) 
                type = property.PropertyType;
            else 
                throw new ArgumentException(Environment.GetResourceString("Argument_InvalidMemberForNamedArgument")); 

            m_memberInfo = memberInfo; 
            m_value = new CustomAttributeTypedArgument(type, value);
        }

        public CustomAttributeNamedArgument(MemberInfo memberInfo, CustomAttributeTypedArgument typedArgument) 
        {
            if (memberInfo == null) 
                throw new ArgumentNullException("memberInfo"); 

            m_memberInfo = memberInfo; 
            m_value = typedArgument;
        }
        #endregion
 
        #region Object Override
        public override string ToString() 
        { 
            return String.Format(CultureInfo.CurrentCulture, "{0} = {1}", MemberInfo.Name, TypedValue.ToString(ArgumentType != typeof(object)));
        } 
        public override int GetHashCode()
        {
            return base.GetHashCode();
        } 
        public override bool Equals(object obj)
        { 
            return obj == (object)this; 
        }
        #endregion 

        #region Internal Members
        internal Type ArgumentType
        { 
            get
            { 
                return m_memberInfo is FieldInfo ? 
                    ((FieldInfo)m_memberInfo).FieldType :
                    ((PropertyInfo)m_memberInfo).PropertyType; 
            }
        }
        #endregion
 
        #region Public Members
        public MemberInfo MemberInfo { get { return m_memberInfo; } } 
        public CustomAttributeTypedArgument TypedValue { get { return m_value; } } 
        #endregion
    } 

    [Serializable]
    [ComVisible(true)]
    public struct CustomAttributeTypedArgument 
    {
        #region Public Static Members 
        public static bool operator ==(CustomAttributeTypedArgument left, CustomAttributeTypedArgument right) 
        {
            return left.Equals(right); 
        }
        public static bool operator !=(CustomAttributeTypedArgument left, CustomAttributeTypedArgument right)
        {
            return !left.Equals(right); 
        }
        #endregion 
 
        #region Private Static Methods
        private static Type CustomAttributeEncodingToType(CustomAttributeEncoding encodedType) 
        {
            switch (encodedType)
            {
                case (CustomAttributeEncoding.Enum): 
                    return typeof(Enum);
 
                case (CustomAttributeEncoding.Int32): 
                    return typeof(int);
 
                case (CustomAttributeEncoding.String):
                    return typeof(string);

                case (CustomAttributeEncoding.Type): 
                    return typeof(Type);
 
                case (CustomAttributeEncoding.Array): 
                    return typeof(Array);
 
                case (CustomAttributeEncoding.Char):
                    return typeof(char);

                case (CustomAttributeEncoding.Boolean): 
                    return typeof(bool);
 
                case (CustomAttributeEncoding.SByte): 
                    return typeof(sbyte);
 
                case (CustomAttributeEncoding.Byte):
                    return typeof(byte);

                case (CustomAttributeEncoding.Int16): 
                    return typeof(short);
 
                case (CustomAttributeEncoding.UInt16): 
                    return typeof(ushort);
 
                case (CustomAttributeEncoding.UInt32):
                    return typeof(uint);

                case (CustomAttributeEncoding.Int64): 
                    return typeof(long);
 
                case (CustomAttributeEncoding.UInt64): 
                    return typeof(ulong);
 
                case (CustomAttributeEncoding.Float):
                    return typeof(float);

                case (CustomAttributeEncoding.Double): 
                    return typeof(double);
 
                case (CustomAttributeEncoding.Object): 
                    return typeof(object);
 
                default :
                    throw new ArgumentException(Environment.GetResourceString("Arg_EnumIllegalVal", (int)encodedType), "encodedType");
            }
        } 
        [System.Security.SecuritySafeCritical]  // auto-generated
        private static object EncodedValueToRawValue(long val, CustomAttributeEncoding encodedType) 
        { 
            switch (encodedType)
            { 
                case CustomAttributeEncoding.Boolean:
                    return (byte)val != 0;

                case CustomAttributeEncoding.Char: 
                    return (char)val;
 
                case CustomAttributeEncoding.Byte: 
                    return (byte)val;
 
                case CustomAttributeEncoding.SByte:
                    return (sbyte)val;

                case CustomAttributeEncoding.Int16: 
                    return (short)val;
 
                case CustomAttributeEncoding.UInt16: 
                    return (ushort)val;
 
                case CustomAttributeEncoding.Int32:
                    return (int)val;

                case CustomAttributeEncoding.UInt32: 
                    return (uint)val;
 
                case CustomAttributeEncoding.Int64: 
                    return (long)val;
 
                case CustomAttributeEncoding.UInt64:
                    return (ulong)val;

                case CustomAttributeEncoding.Float: 
                    unsafe { return *(float*)&val; }
 
                case CustomAttributeEncoding.Double: 
                    unsafe { return *(double*)&val; }
 
                default:
                    throw new ArgumentException(Environment.GetResourceString("Arg_EnumIllegalVal", (int)val), "val");
            }
        } 
        private static RuntimeType ResolveType(RuntimeModule scope, string typeName)
        { 
            RuntimeType type = RuntimeTypeHandle.GetTypeByNameUsingCARules(typeName, scope); 

            if (type == null) 
                throw new InvalidOperationException(
                    String.Format(CultureInfo.CurrentUICulture, Environment.GetResourceString("Arg_CATypeResolutionFailed"), typeName));

            return type; 
        }
        #endregion 
 
        #region Private Data Members
        private object m_value; 
        private Type m_argumentType;
        #endregion

        #region Constructor 
        public CustomAttributeTypedArgument(Type argumentType, object value)
        { 
            // value can be null. 
            if (argumentType == null)
                throw new ArgumentNullException("argumentType"); 

            m_value = (value == null) ? null : CanonicalizeValue(value);
            m_argumentType = argumentType;
        } 

        public CustomAttributeTypedArgument(object value) 
        { 
            // value cannot be null.
            if (value == null) 
                throw new ArgumentNullException("value");

            m_value = CanonicalizeValue(value);
            m_argumentType = value.GetType(); 
        }
 
        private static object CanonicalizeValue(object value) 
        {
            Contract.Assert(value != null); 

            if (value.GetType().IsEnum)
            {
                return ((Enum)value).GetValue(); 
            }
            return value; 
        } 

        [System.Security.SecuritySafeCritical]  // auto-generated 
        internal CustomAttributeTypedArgument(RuntimeModule scope, CustomAttributeEncodedArgument encodedArg)
        {
            CustomAttributeEncoding encodedType = encodedArg.CustomAttributeType.EncodedType;
 
            if (encodedType == CustomAttributeEncoding.Undefined)
                throw new ArgumentException("encodedArg"); 
 
            else if (encodedType == CustomAttributeEncoding.Enum)
            { 
                m_argumentType = ResolveType(scope, encodedArg.CustomAttributeType.EnumName);
                m_value = EncodedValueToRawValue(encodedArg.PrimitiveValue, encodedArg.CustomAttributeType.EncodedEnumType);
            }
            else if (encodedType == CustomAttributeEncoding.String) 
            {
                m_argumentType = typeof(string); 
                m_value = encodedArg.StringValue; 
            }
            else if (encodedType == CustomAttributeEncoding.Type) 
            {
                m_argumentType = typeof(Type);

                m_value = null; 

                if (encodedArg.StringValue != null) 
                    m_value = ResolveType(scope, encodedArg.StringValue); 
            }
            else if (encodedType == CustomAttributeEncoding.Array) 
            {
                encodedType = encodedArg.CustomAttributeType.EncodedArrayType;
                Type elementType;
 
                if (encodedType == CustomAttributeEncoding.Enum)
                { 
                    elementType = ResolveType(scope, encodedArg.CustomAttributeType.EnumName); 
                }
                else 
                {
                    elementType = CustomAttributeEncodingToType(encodedType);
                }
 
                m_argumentType = elementType.MakeArrayType();
 
                if (encodedArg.ArrayValue == null) 
                {
                    m_value = null; 
                }
                else
                {
                    CustomAttributeTypedArgument[] arrayValue = new CustomAttributeTypedArgument[encodedArg.ArrayValue.Length]; 
                    for (int i = 0; i < arrayValue.Length; i++)
                        arrayValue[i] = new CustomAttributeTypedArgument(scope, encodedArg.ArrayValue[i]); 
 
                    m_value = Array.AsReadOnly(arrayValue);
                } 
            }
            else
            {
                m_argumentType = CustomAttributeEncodingToType(encodedType); 
                m_value = EncodedValueToRawValue(encodedArg.PrimitiveValue, encodedType);
            } 
        } 
        #endregion
 
        #region Object Overrides
        public override string ToString() { return ToString(false); }
        [System.Security.SecuritySafeCritical]  // auto-generated
        internal string ToString(bool typed) 
        {
            if (ArgumentType.IsEnum) 
                return String.Format(CultureInfo.CurrentCulture, typed ? "{0}" : "({1}){0}", Value, ArgumentType.FullName); 

            else if (Value == null) 
                return String.Format(CultureInfo.CurrentCulture, typed ? "null" : "({0})null", ArgumentType.Name);

            else if (ArgumentType == typeof(string))
                return String.Format(CultureInfo.CurrentCulture, "\"{0}\"", Value); 

            else if (ArgumentType == typeof(char)) 
                return String.Format(CultureInfo.CurrentCulture, "'{0}'", Value); 

            else if (ArgumentType == typeof(Type)) 
                return String.Format(CultureInfo.CurrentCulture, "typeof({0})", ((Type)Value).FullName);

            else if (ArgumentType.IsArray)
            { 
                string result = null;
                IList array = Value as IList; 
 
                Type elementType = ArgumentType.GetElementType();
                result = String.Format(CultureInfo.CurrentCulture, @"new {0}[{1}] {{ ", elementType.IsEnum ? elementType.FullName : elementType.Name, array.Count); 

                for (int i = 0; i < array.Count; i++)
                    result += String.Format(CultureInfo.CurrentCulture, i == 0 ? "{0}" : ", {0}", array[i].ToString(elementType != typeof(object)));
 
                return result += " }";
            } 
 
            return String.Format(CultureInfo.CurrentCulture, typed ? "{0}" : "({1}){0}", Value, ArgumentType.Name);
        } 
        [System.Security.SecuritySafeCritical]  // auto-generated
        public override int GetHashCode()
        {
            return base.GetHashCode(); 
        }
        public override bool Equals(object obj) 
        { 
            return obj == (object)this;
        } 
        #endregion

        #region Public Members
        public Type ArgumentType 
        {
            get 
            { 
                return m_argumentType;
            } 
        }
        public object Value
        {
            get 
            {
                return m_value; 
            } 
        }
        #endregion 
    }

    [Serializable]
    internal struct CustomAttributeRecord 
    {
        internal ConstArray blob; 
        internal MetadataToken tkCtor; 
    }
 
    [Serializable]
    internal enum CustomAttributeEncoding : int
    {
        Undefined = 0, 
        Boolean = CorElementType.Boolean,
        Char = CorElementType.Char, 
        SByte = CorElementType.I1, 
        Byte = CorElementType.U1,
        Int16 = CorElementType.I2, 
        UInt16 = CorElementType.U2,
        Int32 = CorElementType.I4,
        UInt32 = CorElementType.U4,
        Int64 = CorElementType.I8, 
        UInt64 = CorElementType.U8,
        Float = CorElementType.R4, 
        Double = CorElementType.R8, 
        String = CorElementType.String,
        Array = CorElementType.SzArray, 
        Type = 0x50,
        Object = 0x51,
        Field = 0x53,
        Property = 0x54, 
        Enum = 0x55
    } 
 
    [Serializable]
    [StructLayout(LayoutKind.Auto)] 
    internal struct CustomAttributeEncodedArgument
    {
        #region Parser
        [System.Security.SecurityCritical]  // auto-generated 
        [ResourceExposure(ResourceScope.None)]
        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        private static extern void ParseAttributeArguments( 
            IntPtr pCa,
            int cCa, 
            ref CustomAttributeCtorParameter[] CustomAttributeCtorParameters,
            ref CustomAttributeNamedParameter[] CustomAttributeTypedArgument,
            RuntimeAssembly assembly);
 
        [System.Security.SecurityCritical]  // auto-generated
        internal static void ParseAttributeArguments(ConstArray attributeBlob, 
            ref CustomAttributeCtorParameter[] customAttributeCtorParameters, 
            ref CustomAttributeNamedParameter[] customAttributeNamedParameters,
            RuntimeModule customAttributeModule) 
        {
            if (customAttributeModule == null)
                throw new ArgumentNullException("customAttributeModule");
            Contract.EndContractBlock(); 

            Contract.Assert(customAttributeCtorParameters != null); 
            Contract.Assert(customAttributeNamedParameters != null); 

            if (customAttributeCtorParameters.Length != 0 || customAttributeNamedParameters.Length != 0) 
            {
                unsafe
                {
                    ParseAttributeArguments( 
                        attributeBlob.Signature,
                        (int)attributeBlob.Length, 
                        ref customAttributeCtorParameters, 
                        ref customAttributeNamedParameters,
                        (RuntimeAssembly)customAttributeModule.Assembly); 
                }
            }
        }
        #endregion 

        #region Private Data Members 
        private long m_primitiveValue; 
        private CustomAttributeEncodedArgument[] m_arrayValue;
        private string m_stringValue; 
        private CustomAttributeType m_type;
        #endregion

        #region Public Members 
        public CustomAttributeType CustomAttributeType { get { return m_type; } }
        public long PrimitiveValue { get { return m_primitiveValue; } } 
        public CustomAttributeEncodedArgument[] ArrayValue { get { return m_arrayValue; } } 
        public string StringValue { get { return m_stringValue; } }
        #endregion 
    }

    [Serializable]
    [StructLayout(LayoutKind.Auto)] 
    internal struct CustomAttributeNamedParameter
    { 
        #region Private Data Members 
        private string m_argumentName;
        private CustomAttributeEncoding m_fieldOrProperty; 
        private CustomAttributeEncoding m_padding;
        private CustomAttributeType m_type;
        private CustomAttributeEncodedArgument m_encodedArgument;
        #endregion 

        #region Constructor 
        public CustomAttributeNamedParameter(string argumentName, CustomAttributeEncoding fieldOrProperty, CustomAttributeType type) 
        {
            if (argumentName == null) 
                throw new ArgumentNullException("argumentName");
            Contract.EndContractBlock();

            m_argumentName = argumentName; 
            m_fieldOrProperty = fieldOrProperty;
            m_padding = fieldOrProperty; 
            m_type = type; 
            m_encodedArgument = new CustomAttributeEncodedArgument();
        } 
        #endregion

        #region Public Members
        public CustomAttributeEncodedArgument EncodedArgument { get { return m_encodedArgument; } } 
        #endregion
    } 
 
    [Serializable]
    [StructLayout(LayoutKind.Auto)] 
    internal struct CustomAttributeCtorParameter
    {
        #region Private Data Members
        private CustomAttributeType m_type; 
        private CustomAttributeEncodedArgument m_encodedArgument;
        #endregion 
 
        #region Constructor
        public CustomAttributeCtorParameter(CustomAttributeType type) 
        {
            m_type = type;
            m_encodedArgument = new CustomAttributeEncodedArgument();
        } 
        #endregion
 
        #region Public Members 
        public CustomAttributeEncodedArgument CustomAttributeEncodedArgument { get { return m_encodedArgument; } }
        #endregion 
    }

    // Note: This is a managed representation of a frame type defined in vm\frames.h; please ensure the layout remains
    // synchronized. 
    [StructLayout(LayoutKind.Sequential)]
    internal struct SecurityContextFrame 
    { 
        IntPtr m_GSCookie;      // This is actually at a negative offset in the real frame definition
        IntPtr __VFN_table;     // This is the real start of the SecurityContextFrame 
        IntPtr m_Next;
        IntPtr m_Assembly;

        [System.Security.SecurityCritical]  // auto-generated 
        [ResourceExposure(ResourceScope.None)]
        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        public extern void Push(RuntimeAssembly assembly); 

        [System.Security.SecurityCritical]  // auto-generated 
        [ResourceExposure(ResourceScope.None)]
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
        public extern void Pop(); 
    }
 
    [Serializable] 
    [StructLayout(LayoutKind.Auto)]
    internal struct CustomAttributeType 
    {
        #region Private Data Members
        /// The most complicated type is an enum[] in which case...
        private string m_enumName; // ...enum name 
        private CustomAttributeEncoding m_encodedType; // ...array
        private CustomAttributeEncoding m_encodedEnumType; // ...enum 
        private CustomAttributeEncoding m_encodedArrayType; // ...enum type 
        private CustomAttributeEncoding m_padding;
        #endregion 

        #region Constructor
        public CustomAttributeType(CustomAttributeEncoding encodedType, CustomAttributeEncoding encodedArrayType,
            CustomAttributeEncoding encodedEnumType, string enumName) 
        {
            m_encodedType = encodedType; 
            m_encodedArrayType = encodedArrayType; 
            m_encodedEnumType = encodedEnumType;
            m_enumName = enumName; 
            m_padding = m_encodedType;
        }
        #endregion
 
        #region Public Members
        public CustomAttributeEncoding EncodedType { get { return m_encodedType; } } 
        public CustomAttributeEncoding EncodedEnumType { get { return m_encodedEnumType; } } 
        public CustomAttributeEncoding EncodedArrayType { get { return m_encodedArrayType; } }
        [System.Runtime.InteropServices.ComVisible(true)] 
        public string EnumName { get { return m_enumName; } }
        #endregion
    }
 
    internal unsafe static class CustomAttribute
    { 
        #region Private Data Members 
        private static RuntimeType Type_RuntimeType = (RuntimeType)typeof(RuntimeType);
        private static RuntimeType Type_Type = (RuntimeType)typeof(Type); 
        #endregion

        #region Internal Static Members
        [System.Security.SecurityCritical]  // auto-generated 
        internal static bool IsDefined(RuntimeType type, RuntimeType caType, bool inherit)
        { 
            Contract.Requires(type != null); 

            if (type.GetElementType() != null) 
                return false;

            if (PseudoCustomAttribute.IsDefined(type, caType))
                return true; 

            if (IsCustomAttributeDefined(type.GetRuntimeModule(), type.MetadataToken, caType)) 
                return true; 

            if (!inherit) 
                return false;

            type = type.BaseType as RuntimeType;
 
            while (type != null)
            { 
                if (IsCustomAttributeDefined(type.GetRuntimeModule(), type.MetadataToken, caType, inherit)) 
                    return true;
 
                type = type.BaseType as RuntimeType;
            }

            return false; 
        }
 
        [System.Security.SecuritySafeCritical]  // auto-generated 
        internal static bool IsDefined(RuntimeMethodInfo method, RuntimeType caType, bool inherit)
        { 
            Contract.Requires(method != null);
            Contract.Requires(caType != null);

            if (PseudoCustomAttribute.IsDefined(method, caType)) 
                return true;
 
            if (IsCustomAttributeDefined(method.GetRuntimeModule(), method.MetadataToken, caType)) 
                return true;
 
            if (!inherit)
                return false;

            method = method.GetParentDefinition(); 

            while (method != null) 
            { 
                if (IsCustomAttributeDefined(method.GetRuntimeModule(), method.MetadataToken, caType, inherit))
                    return true; 

                method = method.GetParentDefinition();
            }
 
            return false;
        } 
 
        [System.Security.SecurityCritical]  // auto-generated
        internal static bool IsDefined(RuntimeConstructorInfo ctor, RuntimeType caType) 
        {
            Contract.Requires(ctor != null);
            Contract.Requires(caType != null);
 
            if (PseudoCustomAttribute.IsDefined(ctor, caType))
                return true; 
 
            return IsCustomAttributeDefined(ctor.GetRuntimeModule(), ctor.MetadataToken, caType);
        } 

        [System.Security.SecurityCritical]  // auto-generated
        internal static bool IsDefined(RuntimePropertyInfo property, RuntimeType caType)
        { 
            Contract.Requires(property != null);
            Contract.Requires(caType != null); 
 
            if (PseudoCustomAttribute.IsDefined(property, caType))
                return true; 

            return IsCustomAttributeDefined(property.GetRuntimeModule(), property.MetadataToken, caType);
        }
 
        [System.Security.SecurityCritical]  // auto-generated
        internal static bool IsDefined(RuntimeEventInfo e, RuntimeType caType) 
        { 
            Contract.Requires(e != null);
            Contract.Requires(caType != null); 

            if (PseudoCustomAttribute.IsDefined(e, caType))
                return true;
 
            return IsCustomAttributeDefined(e.GetRuntimeModule(), e.MetadataToken, caType);
        } 
 
        [System.Security.SecurityCritical]  // auto-generated
        internal static bool IsDefined(RuntimeFieldInfo field, RuntimeType caType) 
        {
            Contract.Requires(field != null);
            Contract.Requires(caType != null);
 
            if (PseudoCustomAttribute.IsDefined(field, caType))
                return true; 
 
            return IsCustomAttributeDefined(field.GetRuntimeModule(), field.MetadataToken, caType);
        } 

        [System.Security.SecurityCritical]  // auto-generated
        internal static bool IsDefined(RuntimeParameterInfo parameter, RuntimeType caType)
        { 
            Contract.Requires(parameter != null);
            Contract.Requires(caType != null); 
 
            if (PseudoCustomAttribute.IsDefined(parameter, caType))
                return true; 

            return IsCustomAttributeDefined(parameter.GetRuntimeModule(), parameter.MetadataToken, caType);
        }
 
        [System.Security.SecuritySafeCritical]  // auto-generated
        internal static bool IsDefined(RuntimeAssembly assembly, RuntimeType caType) 
        { 
            Contract.Requires(assembly != null);
            Contract.Requires(caType != null); 

            if (PseudoCustomAttribute.IsDefined(assembly, caType))
                return true;
 
            return IsCustomAttributeDefined(assembly.ManifestModule as RuntimeModule, RuntimeAssembly.GetToken(assembly.GetNativeHandle()), caType);
        } 
 
        [System.Security.SecurityCritical]  // auto-generated
        internal static bool IsDefined(RuntimeModule module, RuntimeType caType) 
        {
            Contract.Requires(module != null);
            Contract.Requires(caType != null);
 
            if (PseudoCustomAttribute.IsDefined(module, caType))
                return true; 
 
            return IsCustomAttributeDefined(module, module.MetadataToken, caType);
        } 

        [System.Security.SecurityCritical]  // auto-generated
        internal static Object[] GetCustomAttributes(RuntimeType type, RuntimeType caType, bool inherit)
        { 
            Contract.Requires(type != null);
            Contract.Requires(caType != null); 
 
            if (type.GetElementType() != null)
                return (caType.IsValueType) ? new object[0] : CreateAttributeArrayHelper(caType, 0); 

            if (type.IsGenericType && !type.IsGenericTypeDefinition)
                type = type.GetGenericTypeDefinition() as RuntimeType;
 
            int pcaCount = 0;
            Attribute[] pca = PseudoCustomAttribute.GetCustomAttributes(type, caType, true, out pcaCount); 
 
            // if we are asked to go up the hierarchy chain we have to do it now and regardless of the
            // attribute usage for the specific attribute because a derived attribute may override the usage... 
            // ... however if the attribute is sealed we can rely on the attribute usage
            if (!inherit || (caType.IsSealed && !CustomAttribute.GetAttributeUsage(caType).Inherited))
            {
                object[] attributes = GetCustomAttributes(type.GetRuntimeModule(), type.MetadataToken, pcaCount, caType, !AllowCriticalCustomAttributes(type)); 
                if (pcaCount > 0) Array.Copy(pca, 0, attributes, attributes.Length - pcaCount, pcaCount);
                return attributes; 
            } 

            List result = new List(); 
            bool mustBeInheritable = false;
            bool useObjectArray = (caType == null || caType.IsValueType || caType.ContainsGenericParameters);
            Type arrayType = useObjectArray ? typeof(object) : caType;
 
            while (pcaCount > 0)
                result.Add(pca[--pcaCount]); 
 
            while (type != (RuntimeType)typeof(object) && type != null)
            { 
                object[] attributes = GetCustomAttributes(type.GetRuntimeModule(), type.MetadataToken, 0, caType, mustBeInheritable, result, !AllowCriticalCustomAttributes(type));
                mustBeInheritable = true;
                for (int i = 0; i < attributes.Length; i++)
                    result.Add(attributes[i]); 

                type = type.BaseType as RuntimeType; 
            } 

            object[] typedResult = CreateAttributeArrayHelper(arrayType, result.Count); 
            Array.Copy(result.ToArray(), 0, typedResult, 0, result.Count);
            return typedResult;
        }
 
        private static bool AllowCriticalCustomAttributes(RuntimeType type)
        { 
            if (type.IsGenericParameter) 
            {
                // Generic parameters don't have transparency state, so look at the 
                // declaring method/type. One of declaringMethod or declaringType
                // must be set.
                MethodBase declaringMethod = type.DeclaringMethod;
                if (declaringMethod != null) 
                {
                    return AllowCriticalCustomAttributes(declaringMethod); 
                } 
                else
                { 
                    type = type.DeclaringType as RuntimeType;
                    Contract.Assert(type != null);
                }
            } 

            return !type.IsSecurityTransparent || SpecialAllowCriticalAttributes(type); 
        } 

        private static bool SpecialAllowCriticalAttributes(RuntimeType type) 
        {
            // Types participating in Type Equivalence are always transparent.
            // See TokenSecurityDescriptor::VerifySemanticDataComputed in securitymeta.cpp.
            // Because of that we allow critical attributes applied to full trust equivalent types. 

#if FEATURE_CORECLR 
            return false; 
#else
            return type.Assembly.IsFullyTrusted && RuntimeTypeHandle.IsEquivalentType(type); 
#endif //!FEATURE_CORECLR
        }

        private static bool AllowCriticalCustomAttributes(MethodBase method) 
        {
            Contract.Requires(method is RuntimeMethodInfo || method is RuntimeConstructorInfo); 
 
            return !method.IsSecurityTransparent ||
                SpecialAllowCriticalAttributes((RuntimeType)method.DeclaringType); 
        }

        private static bool AllowCriticalCustomAttributes(RuntimeFieldInfo field)
        { 
            return !field.IsSecurityTransparent ||
                SpecialAllowCriticalAttributes((RuntimeType)field.DeclaringType); 
        } 

        private static bool AllowCriticalCustomAttributes(RuntimeParameterInfo parameter) 
        {
            // Since parameters have no transparency state, we look at the defining method instead.
            return AllowCriticalCustomAttributes(parameter.DefiningMethod);
        } 

        [System.Security.SecurityCritical]  // auto-generated 
        internal static Object[] GetCustomAttributes(RuntimeMethodInfo method, RuntimeType caType, bool inherit) 
        {
            Contract.Requires(method != null); 
            Contract.Requires(caType != null);

            if (method.IsGenericMethod && !method.IsGenericMethodDefinition)
                method = method.GetGenericMethodDefinition() as RuntimeMethodInfo; 

            int pcaCount = 0; 
            Attribute[] pca = PseudoCustomAttribute.GetCustomAttributes(method, caType, true, out pcaCount); 

            // if we are asked to go up the hierarchy chain we have to do it now and regardless of the 
            // attribute usage for the specific attribute because a derived attribute may override the usage...
            // ... however if the attribute is sealed we can rely on the attribute usage
            if (!inherit || (caType.IsSealed && !CustomAttribute.GetAttributeUsage(caType).Inherited))
            { 
                object[] attributes = GetCustomAttributes(method.GetRuntimeModule(), method.MetadataToken, pcaCount, caType, !AllowCriticalCustomAttributes(method));
                if (pcaCount > 0) Array.Copy(pca, 0, attributes, attributes.Length - pcaCount, pcaCount); 
                return attributes; 
            }
 
            List result = new List();
            bool mustBeInheritable = false;
            bool useObjectArray = (caType == null || caType.IsValueType || caType.ContainsGenericParameters);
            Type arrayType = useObjectArray ? typeof(object) : caType; 

            while (pcaCount > 0) 
                result.Add(pca[--pcaCount]); 

            while (method != null) 
            {
                object[] attributes = GetCustomAttributes(method.GetRuntimeModule(), method.MetadataToken, 0, caType, mustBeInheritable, result, !AllowCriticalCustomAttributes(method));
                mustBeInheritable = true;
                for (int i = 0; i < attributes.Length; i++) 
                    result.Add(attributes[i]);
 
                method = method.GetParentDefinition(); 
            }
 
            object[] typedResult = CreateAttributeArrayHelper(arrayType, result.Count);
            Array.Copy(result.ToArray(), 0, typedResult, 0, result.Count);
            return typedResult;
        } 

        [System.Security.SecuritySafeCritical]  // auto-generated 
        internal static Object[] GetCustomAttributes(RuntimeConstructorInfo ctor, RuntimeType caType) 
        {
            Contract.Requires(ctor != null); 
            Contract.Requires(caType != null);

            int pcaCount = 0;
            Attribute[] pca = PseudoCustomAttribute.GetCustomAttributes(ctor, caType, true, out pcaCount); 
            object[] attributes = GetCustomAttributes(ctor.GetRuntimeModule(), ctor.MetadataToken, pcaCount, caType, !AllowCriticalCustomAttributes(ctor));
            if (pcaCount > 0) Array.Copy(pca, 0, attributes, attributes.Length - pcaCount, pcaCount); 
            return attributes; 
        }
 
        [System.Security.SecuritySafeCritical]  // auto-generated
        internal static Object[] GetCustomAttributes(RuntimePropertyInfo property, RuntimeType caType)
        {
            Contract.Requires(property != null); 
            Contract.Requires(caType != null);
 
            int pcaCount = 0; 
            Attribute[] pca = PseudoCustomAttribute.GetCustomAttributes(property, caType, out pcaCount);
            // Since properties and events have no transparency state, logically we should check the declaring types. 
            // But then if someone wanted to apply critical attributes on a property/event he would need to make the type critical,
            // which would also implicitly made all the members critical.
            // So we check the containing assembly instead. If the assembly can contain critical code we allow critical attributes on properties/events.
            bool disallowCriticalCustomAttributes = property.GetRuntimeModule().GetRuntimeAssembly().IsAllSecurityTransparent(); 

            object[] attributes = GetCustomAttributes(property.GetRuntimeModule(), property.MetadataToken, pcaCount, caType, disallowCriticalCustomAttributes); 
            if (pcaCount > 0) Array.Copy(pca, 0, attributes, attributes.Length - pcaCount, pcaCount); 
            return attributes;
        } 

        [System.Security.SecuritySafeCritical]  // auto-generated
        internal static Object[] GetCustomAttributes(RuntimeEventInfo e, RuntimeType caType)
        { 
            Contract.Requires(e != null);
            Contract.Requires(caType != null); 
 
            int pcaCount = 0;
            Attribute[] pca = PseudoCustomAttribute.GetCustomAttributes(e, caType, out pcaCount); 
            // Since properties and events have no transparency state, logically we should check the declaring types.
            // But then if someone wanted to apply critical attributes on a property/event he would need to make the type critical,
            // which would also implicitly made all the members critical.
            // So we check the containing assembly instead. If the assembly can contain critical code we allow critical attributes on properties/events. 
            bool disallowCriticalCustomAttributes = e.GetRuntimeModule().GetRuntimeAssembly().IsAllSecurityTransparent();
            object[] attributes = GetCustomAttributes(e.GetRuntimeModule(), e.MetadataToken, pcaCount, caType, disallowCriticalCustomAttributes); 
            if (pcaCount > 0) Array.Copy(pca, 0, attributes, attributes.Length - pcaCount, pcaCount); 
            return attributes;
        } 

        [System.Security.SecuritySafeCritical]  // auto-generated
        internal static Object[] GetCustomAttributes(RuntimeFieldInfo field, RuntimeType caType)
        { 
            Contract.Requires(field != null);
            Contract.Requires(caType != null); 
 
            int pcaCount = 0;
            Attribute[] pca = PseudoCustomAttribute.GetCustomAttributes(field, caType, out pcaCount); 
            object[] attributes = GetCustomAttributes(field.GetRuntimeModule(), field.MetadataToken, pcaCount, caType, !AllowCriticalCustomAttributes(field));
            if (pcaCount > 0) Array.Copy(pca, 0, attributes, attributes.Length - pcaCount, pcaCount);
            return attributes;
        } 

        [System.Security.SecuritySafeCritical]  // auto-generated 
        internal static Object[] GetCustomAttributes(RuntimeParameterInfo parameter, RuntimeType caType) 
        {
            Contract.Requires(parameter != null); 
            Contract.Requires(caType != null);

            int pcaCount = 0;
            Attribute[] pca = PseudoCustomAttribute.GetCustomAttributes(parameter, caType, out pcaCount); 
            object[] attributes = GetCustomAttributes(parameter.GetRuntimeModule(), parameter.MetadataToken, pcaCount, caType, !AllowCriticalCustomAttributes(parameter));
            if (pcaCount > 0) Array.Copy(pca, 0, attributes, attributes.Length - pcaCount, pcaCount); 
            return attributes; 
        }
 
        [System.Security.SecuritySafeCritical]  // auto-generated
        internal static Object[] GetCustomAttributes(RuntimeAssembly assembly, RuntimeType caType)
        {
            Contract.Requires(assembly != null); 
            Contract.Requires(caType != null);
 
            int pcaCount = 0; 
            Attribute[] pca = PseudoCustomAttribute.GetCustomAttributes(assembly, caType, true, out pcaCount);
            int assemblyToken = RuntimeAssembly.GetToken(assembly.GetNativeHandle()); 
            bool isAssemblySecurityTransparent = assembly.IsAllSecurityTransparent();
            object[] attributes = GetCustomAttributes(assembly.ManifestModule as RuntimeModule, assemblyToken, pcaCount, caType, isAssemblySecurityTransparent);
            if (pcaCount > 0) Array.Copy(pca, 0, attributes, attributes.Length - pcaCount, pcaCount);
            return attributes; 
        }
 
        [System.Security.SecuritySafeCritical]  // auto-generated 
        internal static Object[] GetCustomAttributes(RuntimeModule module, RuntimeType caType)
        { 
            Contract.Requires(module != null);
            Contract.Requires(caType != null);

            int pcaCount = 0; 
            Attribute[] pca = PseudoCustomAttribute.GetCustomAttributes(module, caType, out pcaCount);
            bool isModuleSecurityTransparent = module.GetRuntimeAssembly().IsAllSecurityTransparent(); 
            object[] attributes = GetCustomAttributes(module, module.MetadataToken, pcaCount, caType, isModuleSecurityTransparent); 
            if (pcaCount > 0) Array.Copy(pca, 0, attributes, attributes.Length - pcaCount, pcaCount);
            return attributes; 
        }

        [System.Security.SecurityCritical]  // auto-generated
        private static bool IsCustomAttributeDefined( 
            RuntimeModule decoratedModule, int decoratedMetadataToken, RuntimeType attributeFilterType)
        { 
            return IsCustomAttributeDefined(decoratedModule, decoratedMetadataToken, attributeFilterType, false); 
        }
 
        [System.Security.SecurityCritical]  // auto-generated
        private static bool IsCustomAttributeDefined(
            RuntimeModule decoratedModule, int decoratedMetadataToken, RuntimeType attributeFilterType, bool mustBeInheritable)
        { 
            if (decoratedModule.Assembly.ReflectionOnly)
                throw new InvalidOperationException(Environment.GetResourceString("Arg_ReflectionOnlyCA")); 
            Contract.EndContractBlock(); 

            MetadataImport scope = decoratedModule.MetadataImport; 
            CustomAttributeRecord[] car = CustomAttributeData.GetCustomAttributeRecords(decoratedModule, decoratedMetadataToken);
            RuntimeType attributeType;
            IRuntimeMethodInfo ctor;
            bool ctorHasParameters, isVarArg; 

            // Optimization for the case where attributes decorate entities in the same assembly in which case 
            // we can cache the successful APTCA check between the decorated and the declared assembly. 
            Assembly lastAptcaOkAssembly = null;
 
            for (int i = 0; i < car.Length; i++)
            {
                CustomAttributeRecord caRecord = car[i];
 
                if (FilterCustomAttributeRecord(caRecord, scope, ref lastAptcaOkAssembly,
                    decoratedModule, decoratedMetadataToken, attributeFilterType, mustBeInheritable, null, null, 
                    out attributeType, out ctor, out ctorHasParameters, out isVarArg)) 
                    return true;
            } 

            return false;
        }
 
        [System.Security.SecurityCritical]  // auto-generated
        private unsafe static object[] GetCustomAttributes( 
            RuntimeModule decoratedModule, int decoratedMetadataToken, int pcaCount, RuntimeType attributeFilterType, bool isDecoratedTargetSecurityTransparent) 
        {
            return GetCustomAttributes(decoratedModule, decoratedMetadataToken, pcaCount, attributeFilterType, false, null, isDecoratedTargetSecurityTransparent); 
        }

        [System.Security.SecurityCritical]  // auto-generated
        private unsafe static object[] GetCustomAttributes( 
            RuntimeModule decoratedModule, int decoratedMetadataToken, int pcaCount,
            RuntimeType attributeFilterType, bool mustBeInheritable, IList derivedAttributes, bool isDecoratedTargetSecurityTransparent) 
        { 
            if (decoratedModule.Assembly.ReflectionOnly)
                throw new InvalidOperationException(Environment.GetResourceString("Arg_ReflectionOnlyCA")); 
            Contract.EndContractBlock();

            MetadataImport scope = decoratedModule.MetadataImport;
            CustomAttributeRecord[] car = CustomAttributeData.GetCustomAttributeRecords(decoratedModule, decoratedMetadataToken); 

            bool useObjectArray = (attributeFilterType == null || attributeFilterType.IsValueType || attributeFilterType.ContainsGenericParameters); 
            Type arrayType = useObjectArray ? typeof(object) : attributeFilterType; 

            if (attributeFilterType == null && car.Length == 0) 
                return CreateAttributeArrayHelper(arrayType, 0);

            object[] attributes = CreateAttributeArrayHelper(arrayType, car.Length);
            int cAttributes = 0; 

            // Custom attribute security checks are done with respect to the assembly *decorated* with the 
            // custom attribute as opposed to the *caller of GetCustomAttributes*. 
            // Since this assembly might not be on the stack and the attribute ctor or property setters we're about to invoke may
            // make security demands, we push a frame on the stack as a proxy for the decorated assembly (this frame will be picked 
            // up an interpreted by the security stackwalker).
            // Once we push the frame it will be automatically popped in the event of an exception, so no need to use CERs or the
            // like.
            SecurityContextFrame frame = new SecurityContextFrame(); 
            frame.Push(decoratedModule.GetRuntimeAssembly());
 
            // Optimization for the case where attributes decorate entities in the same assembly in which case 
            // we can cache the successful APTCA check between the decorated and the declared assembly.
            Assembly lastAptcaOkAssembly = null; 

            for (int i = 0; i < car.Length; i++)
            {
                object attribute = null; 
                CustomAttributeRecord caRecord = car[i];
 
                IRuntimeMethodInfo ctor = null; 
                RuntimeType attributeType = null;
                bool ctorHasParameters, isVarArg; 
                int cNamedArgs = 0;

                IntPtr blobStart = caRecord.blob.Signature;
                IntPtr blobEnd = (IntPtr)((byte*)blobStart + caRecord.blob.Length); 
                int blobLen = (int)((byte*)blobEnd - (byte*)blobStart);
 
                if (!FilterCustomAttributeRecord(caRecord, scope, ref lastAptcaOkAssembly, 
                                                 decoratedModule, decoratedMetadataToken, attributeFilterType, mustBeInheritable,
                                                 attributes, derivedAttributes, 
                                                 out attributeType, out ctor, out ctorHasParameters, out isVarArg))
                    continue;

                if (ctor != null) 
                {
                    // Linktime demand checks 
                    // decoratedMetadataToken needed as it may be "transparent" in which case we do a full stack walk 
                    RuntimeMethodHandle.CheckLinktimeDemands(ctor, decoratedModule, isDecoratedTargetSecurityTransparent);
                } 
                else
                {
                    //
 

                } 
 
                // Leverage RuntimeConstructorInfo standard .ctor verfication
                RuntimeConstructorInfo.CheckCanCreateInstance(attributeType, isVarArg); 

                // Create custom attribute object
                if (ctorHasParameters)
                { 
                    attribute = CreateCaObject(decoratedModule, ctor, ref blobStart, blobEnd, out cNamedArgs);
                } 
                else 
                {
                    attribute = RuntimeTypeHandle.CreateCaInstance(attributeType, ctor); 

                    // It is allowed by the ECMA spec to have an empty signature blob
                    if (blobLen == 0)
                        cNamedArgs = 0; 
                    else
                    { 
                        // Metadata is always written in little-endian format. Must account for this on 
                        // big-endian platforms.
#if BIGENDIAN 
                        const int CustomAttributeVersion = 0x0100;
#else
                        const int CustomAttributeVersion = 0x0001;
#endif 
                        if (Marshal.ReadInt16(blobStart) != CustomAttributeVersion)
                            throw new CustomAttributeFormatException(); 
                        blobStart = (IntPtr)((byte*)blobStart + 2); // skip version prefix 

                        cNamedArgs = Marshal.ReadInt16(blobStart); 
                        blobStart = (IntPtr)((byte*)blobStart + 2); // skip namedArgs count
#if BIGENDIAN
                        cNamedArgs = ((cNamedArgs & 0xff00) >> 8) | ((cNamedArgs & 0x00ff) << 8);
#endif 
                    }
                } 
 
                for (int j = 0; j < cNamedArgs; j++)
                { 
                    #region // Initialize named properties and fields
                    string name;
                    bool isProperty;
                    RuntimeType type; 
                    object value;
 
                    IntPtr blobItr = caRecord.blob.Signature; 

                    GetPropertyOrFieldData(decoratedModule, ref blobStart, blobEnd, out name, out isProperty, out type, out value); 

                    try
                    {
                        if (isProperty) 
                        {
                            #region // Initialize property 
                            if (type == null && value != null) 
                            {
                                type = (RuntimeType)value.GetType(); 
                                if (type == Type_RuntimeType)
                                    type = Type_Type;
                            }
 
                            RuntimePropertyInfo property = null;
 
                            if (type == null) 
                                property = attributeType.GetProperty(name) as RuntimePropertyInfo;
                            else 
                                property = attributeType.GetProperty(name, type, Type.EmptyTypes) as RuntimePropertyInfo;

                            // Did we get a valid property reference?
                            if (property == null) 
                            {
                                throw new CustomAttributeFormatException( 
                                    String.Format(CultureInfo.CurrentUICulture, Environment.GetResourceString( 
                                        isProperty ? "RFLCT.InvalidPropFail" : "RFLCT.InvalidFieldFail"), name));
                            } 

                            RuntimeMethodInfo setMethod = property.GetSetMethod(true) as RuntimeMethodInfo;

                            // Public properties may have non-public setter methods 
                            if (!setMethod.IsPublic)
                                continue; 
 
                            RuntimeMethodHandle.CheckLinktimeDemands(setMethod, decoratedModule, isDecoratedTargetSecurityTransparent);
 
                            setMethod.Invoke(attribute, BindingFlags.Default, null, new object[] { value }, null, true);
                            #endregion
                        }
                        else 
                        {
                            RtFieldInfo field = attributeType.GetField(name) as RtFieldInfo; 
 
                            if (isDecoratedTargetSecurityTransparent)
                            { 
                                RuntimeFieldHandle.CheckAttributeAccess(field.FieldHandle, decoratedModule.GetNativeHandle());
                            }

                            field.InternalSetValue(attribute, value, BindingFlags.Default, Type.DefaultBinder, null, false); 
                        }
                    } 
                    catch (Exception e) 
                    {
                        throw new CustomAttributeFormatException( 
                            String.Format(CultureInfo.CurrentUICulture, Environment.GetResourceString(
                                isProperty ? "RFLCT.InvalidPropFail" : "RFLCT.InvalidFieldFail"), name), e);
                    }
                    #endregion 
                }
 
                if (!blobStart.Equals(blobEnd)) 
                    throw new CustomAttributeFormatException();
 
                attributes[cAttributes++] = attribute;
            }

            // The frame will be popped automatically if we take an exception any time after we pushed it. So no need of a catch or 
            // finally or CERs here.
            frame.Pop(); 
 
            if (cAttributes == car.Length && pcaCount == 0)
                return attributes; 

            object[] result = CreateAttributeArrayHelper(arrayType, cAttributes + pcaCount);
            Array.Copy(attributes, 0, result, 0, cAttributes);
            return result; 
        }
 
        [System.Security.SecurityCritical]  // auto-generated 
        private unsafe static bool FilterCustomAttributeRecord(
            CustomAttributeRecord caRecord, MetadataImport scope, ref Assembly lastAptcaOkAssembly, 
            RuntimeModule decoratedModule, MetadataToken decoratedToken, RuntimeType attributeFilterType, bool mustBeInheritable,
            object[] attributes, IList derivedAttributes,
            out RuntimeType attributeType, out IRuntimeMethodInfo ctor, out bool ctorHasParameters, out bool isVarArg)
        { 
            ctor = null;
            attributeType = null; 
            ctorHasParameters = false; 
            isVarArg = false;
 
            IntPtr blobStart = caRecord.blob.Signature;
            IntPtr blobEnd = (IntPtr)((byte*)blobStart + caRecord.blob.Length);

            // Resolve attribute type from ctor parent token found in decorated decoratedModule scope 
            attributeType = decoratedModule.ResolveType(scope.GetParentToken(caRecord.tkCtor), null, null) as RuntimeType;
 
            // Test attribute type against user provided attribute type filter 
            if (!(attributeFilterType.IsAssignableFrom(attributeType)))
                return false; 

            // Ensure if attribute type must be inheritable that it is inhertiable
            // Ensure that to consider a duplicate attribute type AllowMultiple is true
            if (!AttributeUsageCheck(attributeType, mustBeInheritable, attributes, derivedAttributes)) 
                return false;
 
#if FEATURE_APTCA 
            // APTCA checks
            RuntimeAssembly attributeAssembly = (RuntimeAssembly)attributeType.Assembly; 
            RuntimeAssembly decoratedModuleAssembly = (RuntimeAssembly)decoratedModule.Assembly;

            if (attributeAssembly != lastAptcaOkAssembly &&
                !RuntimeAssembly.AptcaCheck(attributeAssembly, decoratedModuleAssembly)) 
                return false;
 
            // Cache last successful APTCA check (optimization) 
            lastAptcaOkAssembly = decoratedModuleAssembly;
#endif // FEATURE_APTCA 

            // Resolve the attribute ctor
            ConstArray ctorSig = scope.GetMethodSignature(caRecord.tkCtor);
            isVarArg = (ctorSig[0] & 0x05) != 0; 
            ctorHasParameters = ctorSig[1] != 0;
 
            if (ctorHasParameters) 
            {
                // Resolve method ctor token found in decorated decoratedModule scope 
                ctor = ModuleHandle.ResolveMethodHandleInternal(decoratedModule.GetNativeHandle(), caRecord.tkCtor);
            }
            else
            { 
                // Resolve method ctor token from decorated decoratedModule scope
                ctor = attributeType.GetTypeHandleInternal().GetDefaultConstructor(); 
 
                if (ctor == null && !attributeType.IsValueType)
                    throw new MissingMethodException(".ctor"); 
            }

            // Visibility checks
            if (ctor == null) 
            {
                if (!attributeType.IsVisible && !attributeType.TypeHandle.IsVisibleFromModule(decoratedModule)) 
                    return false; 

                return true; 
            }

            if (RuntimeMethodHandle.IsVisibleFromModule(ctor, decoratedModule))
                return true; 

            MetadataToken tkParent = new MetadataToken(); 
 
            if (decoratedToken.IsParamDef)
            { 
                tkParent = new MetadataToken(scope.GetParentToken(decoratedToken));
                tkParent = new MetadataToken(scope.GetParentToken(tkParent));
            }
            else if (decoratedToken.IsMethodDef || decoratedToken.IsProperty || decoratedToken.IsEvent || decoratedToken.IsFieldDef) 
            {
                tkParent = new MetadataToken(scope.GetParentToken(decoratedToken)); 
            } 
            else if (decoratedToken.IsTypeDef)
            { 
                tkParent = decoratedToken;
            }

            if (tkParent.IsTypeDef) 
                return RuntimeMethodHandle.IsVisibleFromType(ctor, decoratedModule.ModuleHandle.ResolveTypeHandle(tkParent));
 
            return false; 
        }
        #endregion 

        #region Private Static Methods
        [System.Security.SecurityCritical]  // auto-generated
        private static bool AttributeUsageCheck( 
            RuntimeType attributeType, bool mustBeInheritable, object[] attributes, IList derivedAttributes)
        { 
            AttributeUsageAttribute attributeUsageAttribute = null; 

            if (mustBeInheritable) 
            {
                attributeUsageAttribute = CustomAttribute.GetAttributeUsage(attributeType);

                if (!attributeUsageAttribute.Inherited) 
                    return false;
            } 
 
            // Legacy: AllowMultiple ignored for none inheritable attributes
 
            if (derivedAttributes == null)
                return true;

            for (int i = 0; i < derivedAttributes.Count; i++) 
            {
                if (derivedAttributes[i].GetType() == attributeType) 
                { 
                    if (attributeUsageAttribute == null)
                        attributeUsageAttribute = CustomAttribute.GetAttributeUsage(attributeType); 

                    return attributeUsageAttribute.AllowMultiple;
                }
            } 

            return true; 
        } 

        [System.Security.SecurityCritical]  // auto-generated 
        internal static AttributeUsageAttribute GetAttributeUsage(RuntimeType decoratedAttribute)
        {
            RuntimeModule decoratedModule = decoratedAttribute.GetRuntimeModule();
            MetadataImport scope = decoratedModule.MetadataImport; 
            CustomAttributeRecord[] car = CustomAttributeData.GetCustomAttributeRecords(decoratedModule, decoratedAttribute.MetadataToken);
 
            AttributeUsageAttribute attributeUsageAttribute = null; 

            for (int i = 0; i < car.Length; i++) 
            {
                CustomAttributeRecord caRecord = car[i];
                RuntimeType attributeType = decoratedModule.ResolveType(scope.GetParentToken(caRecord.tkCtor), null, null) as RuntimeType;
 
                if (attributeType != (RuntimeType)typeof(AttributeUsageAttribute))
                    continue; 
 
                if (attributeUsageAttribute != null)
                    throw new FormatException(String.Format( 
                        CultureInfo.CurrentUICulture, Environment.GetResourceString("Format_AttributeUsage"), attributeType));

                AttributeTargets targets;
                bool inherited, allowMultiple; 
                ParseAttributeUsageAttribute(caRecord.blob, out targets, out inherited, out allowMultiple);
                attributeUsageAttribute = new AttributeUsageAttribute(targets, allowMultiple, inherited); 
            } 

            if (attributeUsageAttribute == null) 
                return AttributeUsageAttribute.Default;

            return attributeUsageAttribute;
        } 
        #endregion
 
        #region Private Static FCalls 
        [System.Security.SecurityCritical]  // auto-generated
        [ResourceExposure(ResourceScope.None)] 
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        private static extern void _ParseAttributeUsageAttribute(
            IntPtr pCa, int cCa, out int targets, out bool inherited, out bool allowMultiple);
        [System.Security.SecurityCritical]  // auto-generated 
        private static void ParseAttributeUsageAttribute(
            ConstArray ca, out AttributeTargets targets, out bool inherited, out bool allowMultiple) 
        { 
            int _targets;
            _ParseAttributeUsageAttribute(ca.Signature, ca.Length, out _targets, out inherited, out allowMultiple); 
            targets = (AttributeTargets)_targets;
        }

        [System.Security.SecurityCritical]  // auto-generated 
        [ResourceExposure(ResourceScope.None)]
        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        private static unsafe extern Object _CreateCaObject(RuntimeModule pModule, IRuntimeMethodInfo pCtor, byte** ppBlob, byte* pEndBlob, int* pcNamedArgs); 
        [System.Security.SecurityCritical]  // auto-generated
        private static unsafe Object CreateCaObject(RuntimeModule module, IRuntimeMethodInfo ctor, ref IntPtr blob, IntPtr blobEnd, out int namedArgs) 
        {
            byte* pBlob = (byte*)blob;
            byte* pBlobEnd = (byte*)blobEnd;
            int cNamedArgs; 
            object ca = _CreateCaObject(module, ctor, &pBlob, pBlobEnd, &cNamedArgs);
            blob = (IntPtr)pBlob; 
            namedArgs = cNamedArgs; 
            return ca;
        } 

        [System.Security.SecurityCritical]  // auto-generated
        [ResourceExposure(ResourceScope.None)]
        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        private unsafe extern static void _GetPropertyOrFieldData(
            RuntimeModule pModule, byte** ppBlobStart, byte* pBlobEnd, out string name, out bool bIsProperty, out RuntimeType type, out object value); 
        [System.Security.SecurityCritical]  // auto-generated 
        private unsafe static void GetPropertyOrFieldData(
            RuntimeModule module, ref IntPtr blobStart, IntPtr blobEnd, out string name, out bool isProperty, out RuntimeType type, out object value) 
        {
            byte* pBlobStart = (byte*)blobStart;
            _GetPropertyOrFieldData(
                module.GetNativeHandle(), &pBlobStart, (byte*)blobEnd, out name, out isProperty, out type, out value); 
            blobStart = (IntPtr)pBlobStart;
        } 
 
        [System.Security.SecuritySafeCritical]
        private static object[] CreateAttributeArrayHelper(Type elementType, int elementCount) 
        {
            return (object[])Array.UnsafeCreateInstance(elementType, elementCount);
        }
        #endregion 
    }
 
    internal static class PseudoCustomAttribute 
    {
        #region Private Static Data Members 
        // Here we can avoid the need to take a lock when using Dictionary by rearranging
        // the only method that adds values to the Dictionary. For more details on
        // Dictionary versus Hashtable thread safety:
        // See code:Dictionary#DictionaryVersusHashtableThreadSafety 
        private static Dictionary s_pca;
        private static int s_pcasCount; 
        #endregion 

        #region FCalls 
        [System.Security.SecurityCritical]  // auto-generated
        [ResourceExposure(ResourceScope.None)]
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        unsafe private static extern void _GetSecurityAttributes(RuntimeModule module, int token, bool assembly, out object[] securityAttributes); 
        [System.Security.SecurityCritical]  // auto-generated
        unsafe internal static void GetSecurityAttributes(RuntimeModule module, int token, bool assembly, out object[] securityAttributes) 
        { 
            _GetSecurityAttributes(module.GetNativeHandle(), token, assembly, out securityAttributes);
        } 
        #endregion

        #region Static Constructor
        [System.Security.SecurityCritical]  // auto-generated 
        static PseudoCustomAttribute()
        { 
            RuntimeType[] pcas = new RuntimeType[] 
            {
                // See //depot/DevDiv/private/Main/ndp/clr/src/MD/Compiler/CustAttr.cpp 
                typeof(FieldOffsetAttribute) as RuntimeType, // field
#if FEATURE_SERIALIZATION
                typeof(SerializableAttribute) as RuntimeType, // class, struct, enum, delegate
#endif 
                typeof(MarshalAsAttribute) as RuntimeType, // parameter, field, return-value
                typeof(ComImportAttribute) as RuntimeType, // class, interface 
#if FEATURE_SERIALIZATION 
                typeof(NonSerializedAttribute) as RuntimeType, // field, inherited
#endif 
                typeof(InAttribute) as RuntimeType, // parameter
                typeof(OutAttribute) as RuntimeType, // parameter
                typeof(OptionalAttribute) as RuntimeType, // parameter
                typeof(DllImportAttribute) as RuntimeType, // method 
                typeof(PreserveSigAttribute) as RuntimeType, // method
                typeof(TypeForwardedToAttribute) as RuntimeType, // assembly 
            }; 

            s_pcasCount = pcas.Length; 
            Dictionary temp_pca = new Dictionary(s_pcasCount);

            for (int i = 0; i < s_pcasCount; i++)
            { 
                VerifyPseudoCustomAttribute(pcas[i]);
                temp_pca[pcas[i]] = pcas[i]; 
            } 
            s_pca = temp_pca;
        } 

        [System.Security.SecurityCritical]  // auto-generated
        [Conditional("_DEBUG")]
        private static void VerifyPseudoCustomAttribute(RuntimeType pca) 
        {
            // If any of these are invariants are no longer true will have to 
            // re-architect the PCA product logic and test cases -- you've been warned! 
            Contract.Assert(pca.BaseType == (RuntimeType)typeof(Attribute), "Pseudo CA Error");
            AttributeUsageAttribute usage = CustomAttribute.GetAttributeUsage(pca); 
            Contract.Assert(usage.Inherited == false, "Pseudo CA Error");
            //AllowMultiple is true for TypeForwardedToAttribute
            //Contract.Assert(usage.AllowMultiple == false, "Pseudo CA Error");
        } 
        #endregion
 
        #region Internal Static 
        internal static bool IsSecurityAttribute(RuntimeType type)
        { 
            return type == (RuntimeType)typeof(SecurityAttribute) || type.IsSubclassOf(typeof(SecurityAttribute));
        }

        [System.Security.SecurityCritical]  // auto-generated 
        internal static Attribute[] GetCustomAttributes(RuntimeType type, RuntimeType caType, bool includeSecCa, out int count)
        { 
            Contract.Requires(type != null); 
            Contract.Requires(caType != null);
 
            count = 0;

            bool all = caType == (RuntimeType)typeof(object) || caType == (RuntimeType)typeof(Attribute);
            if (!all && s_pca.GetValueOrDefault(caType) == null && !IsSecurityAttribute(caType)) 
                return new Attribute[0];
 
            List pcas = new List(); 
            Attribute pca = null;
 
#if FEATURE_SERIALIZATION
            if (all || caType == (RuntimeType)typeof(SerializableAttribute))
            {
                pca = SerializableAttribute.GetCustomAttribute(type); 
                if (pca != null) pcas.Add(pca);
            } 
#endif 
            if (all || caType == (RuntimeType)typeof(ComImportAttribute))
            { 
                pca = ComImportAttribute.GetCustomAttribute(type);
                if (pca != null) pcas.Add(pca);
            }
            if (includeSecCa && (all || IsSecurityAttribute(caType))) 
            {
                if (!type.IsGenericParameter && type.GetElementType() == null) 
                { 
                    if (type.IsGenericType)
                        type = (RuntimeType)type.GetGenericTypeDefinition(); 

                    object[] securityAttributes;
                    GetSecurityAttributes(type.Module.ModuleHandle.GetRuntimeModule(), type.MetadataToken, false, out securityAttributes);
                    if (securityAttributes != null) 
                        foreach (object a in securityAttributes)
                            if (caType == a.GetType() || a.GetType().IsSubclassOf(caType)) 
                                pcas.Add((Attribute)a); 
                }
            } 

            count = pcas.Count;
            return pcas.ToArray();
        } 
        [System.Security.SecurityCritical]  // auto-generated
        internal static bool IsDefined(RuntimeType type, RuntimeType caType) 
        { 
            bool all = caType == (RuntimeType)typeof(object) || caType == (RuntimeType)typeof(Attribute);
            if (!all && s_pca.GetValueOrDefault(caType) == null && !IsSecurityAttribute(caType)) 
                return false;

#if FEATURE_SERIALIZATION
            if (all || caType == (RuntimeType)typeof(SerializableAttribute)) 
            {
                if (SerializableAttribute.IsDefined(type)) return true; 
            } 
#endif
            if (all || caType == (RuntimeType)typeof(ComImportAttribute)) 
            {
                if (ComImportAttribute.IsDefined(type)) return true;
            }
            if (all || IsSecurityAttribute(caType)) 
            {
                int count; 
                if (GetCustomAttributes(type, caType, true, out count).Length != 0) 
                    return true;
            } 

            return false;
        }
 
        [System.Security.SecurityCritical]  // auto-generated
        internal static Attribute[] GetCustomAttributes(RuntimeMethodInfo method, RuntimeType caType, bool includeSecCa, out int count) 
        { 
            Contract.Requires(method != null);
            Contract.Requires(caType != null); 

            count = 0;

            bool all = caType == (RuntimeType)typeof(object) || caType == (RuntimeType)typeof(Attribute); 
            if (!all && s_pca.GetValueOrDefault(caType) == null && !IsSecurityAttribute(caType))
                return new Attribute[0]; 
 
            List pcas = new List();
            Attribute pca = null; 

            if (all || caType == (RuntimeType)typeof(DllImportAttribute))
            {
                pca = DllImportAttribute.GetCustomAttribute(method); 
                if (pca != null) pcas.Add(pca);
            } 
            if (all || caType == (RuntimeType)typeof(PreserveSigAttribute)) 
            {
                pca = PreserveSigAttribute.GetCustomAttribute(method); 
                if (pca != null) pcas.Add(pca);
            }
            if (includeSecCa && (all || IsSecurityAttribute(caType)))
            { 
                object[] securityAttributes;
 
                GetSecurityAttributes(method.Module.ModuleHandle.GetRuntimeModule(), method.MetadataToken, false, out securityAttributes); 
                if (securityAttributes != null)
                    foreach (object a in securityAttributes) 
                        if (caType == a.GetType() || a.GetType().IsSubclassOf(caType))
                            pcas.Add((Attribute)a);
            }
 
            count = pcas.Count;
            return pcas.ToArray(); 
        } 
        [System.Security.SecurityCritical]  // auto-generated
        internal static bool IsDefined(RuntimeMethodInfo method, RuntimeType caType) 
        {
            bool all = caType == (RuntimeType)typeof(object) || caType == (RuntimeType)typeof(Attribute);
            if (!all && s_pca.GetValueOrDefault(caType) == null)
                return false; 

            if (all || caType == (RuntimeType)typeof(DllImportAttribute)) 
            { 
                if (DllImportAttribute.IsDefined(method)) return true;
            } 
            if (all || caType == (RuntimeType)typeof(PreserveSigAttribute))
            {
                if (PreserveSigAttribute.IsDefined(method)) return true;
            } 
            if (all || IsSecurityAttribute(caType))
            { 
                int count; 

                if (GetCustomAttributes(method, caType, true, out count).Length != 0) 
                    return true;
            }

            return false; 
        }
 
        [System.Security.SecurityCritical]  // auto-generated 
        internal static Attribute[] GetCustomAttributes(RuntimeParameterInfo parameter, RuntimeType caType, out int count)
        { 
            Contract.Requires(parameter != null);
            Contract.Requires(caType != null);

            count = 0; 

            bool all = caType == (RuntimeType)typeof(object) || caType == (RuntimeType)typeof(Attribute); 
            if (!all && s_pca.GetValueOrDefault(caType) == null) 
                return null;
 
            Attribute[] pcas = new Attribute[s_pcasCount];
            Attribute pca = null;

            if (all || caType == (RuntimeType)typeof(InAttribute)) 
            {
                pca = InAttribute.GetCustomAttribute(parameter); 
                if (pca != null) pcas[count++] = pca; 
            }
            if (all || caType == (RuntimeType)typeof(OutAttribute)) 
            {
                pca = OutAttribute.GetCustomAttribute(parameter);
                if (pca != null) pcas[count++] = pca;
            } 
            if (all || caType == (RuntimeType)typeof(OptionalAttribute))
            { 
                pca = OptionalAttribute.GetCustomAttribute(parameter); 
                if (pca != null) pcas[count++] = pca;
            } 
            if (all || caType == (RuntimeType)typeof(MarshalAsAttribute))
            {
                pca = MarshalAsAttribute.GetCustomAttribute(parameter);
                if (pca != null) pcas[count++] = pca; 
            }
            return pcas; 
        } 
        [System.Security.SecurityCritical]  // auto-generated
        internal static bool IsDefined(RuntimeParameterInfo parameter, RuntimeType caType) 
        {
            bool all = caType == (RuntimeType)typeof(object) || caType == (RuntimeType)typeof(Attribute);
            if (!all && s_pca.GetValueOrDefault(caType) == null)
                return false; 

 
            if (all || caType == (RuntimeType)typeof(InAttribute)) 
            {
                if (InAttribute.IsDefined(parameter)) return true; 
            }
            if (all || caType == (RuntimeType)typeof(OutAttribute))
            {
                if (OutAttribute.IsDefined(parameter)) return true; 
            }
            if (all || caType == (RuntimeType)typeof(OptionalAttribute)) 
            { 
                if (OptionalAttribute.IsDefined(parameter)) return true;
            } 
            if (all || caType == (RuntimeType)typeof(MarshalAsAttribute))
            {
                if (MarshalAsAttribute.IsDefined(parameter)) return true;
            } 

            return false; 
        } 

        [System.Security.SecurityCritical]  // auto-generated 
        internal static Attribute[] GetCustomAttributes(RuntimeAssembly assembly, RuntimeType caType, bool includeSecCa, out int count)
        {
            count = 0;
 
            bool all = caType == (RuntimeType)typeof(object) || caType == (RuntimeType)typeof(Attribute);
 
            if (!all && s_pca.GetValueOrDefault(caType) == null && !IsSecurityAttribute(caType)) 
                return new Attribute[0];
 
            List pcas = new List();
            if (includeSecCa && (all || IsSecurityAttribute(caType)))
            {
                object[] securityAttributes; 

                GetSecurityAttributes(assembly.ManifestModule.ModuleHandle.GetRuntimeModule(), RuntimeAssembly.GetToken(assembly.GetNativeHandle()), true, out securityAttributes); 
                if (securityAttributes != null) 
                    foreach (object a in securityAttributes)
                        if (caType == a.GetType() || a.GetType().IsSubclassOf(caType)) 
                            pcas.Add((Attribute)a);
            }

            //TypeForwardedToAttribute.GetCustomAttribute(assembly) throws FileNotFoundException if the forwarded-to 
            //assemblies are not present. This breaks many V4 scenarios because some framework types are forwarded
            //to assemblies not included in the client SKU. Let's omit TypeForwardedTo for now until we have a better solution. 
 
            //if (all || caType == (RuntimeType)typeof(TypeForwardedToAttribute))
            //{ 
            //    TypeForwardedToAttribute[] attrs = TypeForwardedToAttribute.GetCustomAttribute(assembly);
            //    pcas.AddRange(attrs);
            //}
 
            count = pcas.Count;
            return pcas.ToArray(); 
        } 
        [System.Security.SecurityCritical]  // auto-generated
        internal static bool IsDefined(RuntimeAssembly assembly, RuntimeType caType) 
        {
            int count;
            return GetCustomAttributes(assembly, caType, true, out count).Length > 0;
        } 

        internal static Attribute[] GetCustomAttributes(RuntimeModule module, RuntimeType caType, out int count) 
        { 
            count = 0;
            return null; 
        }
        internal static bool IsDefined(RuntimeModule module, RuntimeType caType)
        {
            return false; 
        }
 
        [System.Security.SecurityCritical]  // auto-generated 
        internal static Attribute[] GetCustomAttributes(RuntimeFieldInfo field, RuntimeType caType, out int count)
        { 
            Contract.Requires(field != null);
            Contract.Requires(caType != null);

            count = 0; 

            bool all = caType == (RuntimeType)typeof(object) || caType == (RuntimeType)typeof(Attribute); 
            if (!all && s_pca.GetValueOrDefault(caType) == null) 
                return null;
 
            Attribute[] pcas = new Attribute[s_pcasCount];
            Attribute pca = null;

            if (all || caType == (RuntimeType)typeof(MarshalAsAttribute)) 
            {
                pca = MarshalAsAttribute.GetCustomAttribute(field); 
                if (pca != null) pcas[count++] = pca; 
            }
            if (all || caType == (RuntimeType)typeof(FieldOffsetAttribute)) 
            {
                pca = FieldOffsetAttribute.GetCustomAttribute(field);
                if (pca != null) pcas[count++] = pca;
            } 
#if FEATURE_SERIALIZATION
            if (all || caType == (RuntimeType)typeof(NonSerializedAttribute)) 
            { 
                pca = NonSerializedAttribute.GetCustomAttribute(field);
                if (pca != null) pcas[count++] = pca; 
            }
#endif
            return pcas;
        } 
        [System.Security.SecurityCritical]  // auto-generated
        internal static bool IsDefined(RuntimeFieldInfo field, RuntimeType caType) 
        { 
            bool all = caType == (RuntimeType)typeof(object) || caType == (RuntimeType)typeof(Attribute);
            if (!all && s_pca.GetValueOrDefault(caType) == null) 
                return false;

            if (all || caType == (RuntimeType)typeof(MarshalAsAttribute))
            { 
                if (MarshalAsAttribute.IsDefined(field)) return true;
            } 
            if (all || caType == (RuntimeType)typeof(FieldOffsetAttribute)) 
            {
                if (FieldOffsetAttribute.IsDefined(field)) return true; 
            }
#if FEATURE_SERIALIZATION
            if (all || caType == (RuntimeType)typeof(NonSerializedAttribute))
            { 
                if (NonSerializedAttribute.IsDefined(field)) return true;
            } 
#endif 

            return false; 
        }

        [System.Security.SecurityCritical]  // auto-generated
        internal static Attribute[] GetCustomAttributes(RuntimeConstructorInfo ctor, RuntimeType caType, bool includeSecCa, out int count) 
        {
            count = 0; 
 
            bool all = caType == (RuntimeType)typeof(object) || caType == (RuntimeType)typeof(Attribute);
 
            if (!all && s_pca.GetValueOrDefault(caType) == null && !IsSecurityAttribute(caType))
                return new Attribute[0];

            List pcas = new List(); 

            if (includeSecCa && (all || IsSecurityAttribute(caType))) 
            { 
                object[] securityAttributes;
 
                GetSecurityAttributes(ctor.Module.ModuleHandle.GetRuntimeModule(), ctor.MetadataToken, false, out securityAttributes);
                if (securityAttributes != null)
                    foreach (object a in securityAttributes)
                        if (caType == a.GetType() || a.GetType().IsSubclassOf(caType)) 
                            pcas.Add((Attribute)a);
            } 
 
            count = pcas.Count;
            return pcas.ToArray(); 
        }
        [System.Security.SecurityCritical]  // auto-generated
        internal static bool IsDefined(RuntimeConstructorInfo ctor, RuntimeType caType)
        { 
            bool all = caType == (RuntimeType)typeof(object) || caType == (RuntimeType)typeof(Attribute);
 
            if (!all && s_pca.GetValueOrDefault(caType) == null) 
                return false;
 
            if (all || IsSecurityAttribute(caType))
            {
                int count;
 
                if (GetCustomAttributes(ctor, caType, true, out count).Length != 0)
                    return true; 
            } 

            return false; 
        }

        internal static Attribute[] GetCustomAttributes(RuntimePropertyInfo property, RuntimeType caType, out int count)
        { 
            count = 0;
            return null; 
        } 
        internal static bool IsDefined(RuntimePropertyInfo property, RuntimeType caType)
        { 
            return false;
        }

        internal static Attribute[] GetCustomAttributes(RuntimeEventInfo e, RuntimeType caType, out int count) 
        {
            count = 0; 
            return null; 
        }
        internal static bool IsDefined(RuntimeEventInfo e, RuntimeType caType) 
        {
            return false;
        }
        #endregion 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
                        

                        

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