PropertyRef.cs source code in C# .NET

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Code:

/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / Query / PlanCompiler / PropertyRef.cs / 1305376 / PropertyRef.cs

                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....]
// @backupOwner [....] 
//--------------------------------------------------------------------- 

using System; 
using System.Collections.Generic;
//using System.Diagnostics; // Please use PlanCompiler.Assert instead of Debug.Assert in this class...
using System.Globalization;
 
using System.Data.Common;
using md = System.Data.Metadata.Edm; 
 
//
// The PropertyRef class (and its subclasses) represent references to a property 
// of a type.
// The PropertyRefList class represents a list of expected properties
// where each property from the type is described as a PropertyRef
// 
// These classes are used by the StructuredTypeEliminator module as part of
// eliminating all structured types. The basic idea of this module is that all 
// structured types are flattened out into a single level. To avoid a large amount 
// of potentially unnecessary information, we try to identify what pieces of information
// are really necessary at each node of the tree. This is where PropertyRef comes in. 
// A PropertyRef (and more generally, a PropertyRefList) identifies a list of
// properties, and can be attached to a node/var to indicate that these were the
// only desired properties.
// 
namespace System.Data.Query.PlanCompiler
{ 
    ///  
    /// A PropertyRef class encapsulates a reference to one or more properties of
    /// a complex instance - a record type, a complex type or an entity type. 
    /// A PropertyRef may be of the following kinds.
    ///   - a simple property reference (just a reference to a simple property)
    ///   - a typeid reference - applies only to entitytype and complextypes
    ///   - an entitysetid reference - applies only to ref and entity types 
    ///   - a nested property reference (a reference to a nested property - a.b)
    ///   - an "all" property reference (all properties) 
    ///  
    internal abstract class PropertyRef
    { 
        /// 
        /// trivial constructor
        /// 
        internal PropertyRef() { } 

        ///  
        /// Create a nested property ref, with "p" as the prefix. 
        /// The best way to think of this function as follows.
        /// Consider a type T where "this" describes a property X on T. Now 
        /// consider a new type S, where "p" is a property of S and is of type T.
        /// This function creates a PropertyRef that describes the same property X
        /// from S.p instead
        ///  
        /// the property to prefix with
        /// the nested property reference 
        internal virtual PropertyRef CreateNestedPropertyRef(PropertyRef p) 
        {
            return new NestedPropertyRef(p, this); 
        }

        /// 
        /// Create a nested property ref for a simple property. Delegates to the function 
        /// above
        ///  
        /// the simple property 
        /// a nestedPropertyRef
        internal PropertyRef CreateNestedPropertyRef(md.EdmMember p) 
        {
            return CreateNestedPropertyRef(new SimplePropertyRef(p));
        }
 
        /// 
        /// Creates a nested property ref for a rel-property. Delegates to the function above 
        ///  
        /// the rel-property
        /// a nested property ref 
        internal PropertyRef CreateNestedPropertyRef(InternalTrees.RelProperty p)
        {
            return CreateNestedPropertyRef(new RelPropertyRef(p));
        } 

        ///  
        /// The tostring method for easy debuggability 
        /// 
        ///  
        public override string ToString()
        {
            return "";
        } 
    }
 
    ///  
    /// A "simple" property ref - represents a simple property of the type
    ///  
    internal class SimplePropertyRef : PropertyRef
    {
        private md.EdmMember m_property;
 
        /// 
        /// Simple constructor 
        ///  
        /// the property metadata
        internal SimplePropertyRef(md.EdmMember property) 
        {
            m_property = property;
        }
 
        /// 
        /// Gets the property metadata 
        ///  
        internal md.EdmMember Property { get { return m_property; } }
 
        /// 
        /// Overrides the default equality function. Two SimplePropertyRefs are
        /// equal, if they describe the same property
        ///  
        /// 
        ///  
        public override bool Equals(object obj) 
        {
            SimplePropertyRef other = obj as SimplePropertyRef; 
            return (other != null &&
                InternalTrees.Command.EqualTypes(m_property.DeclaringType, other.m_property.DeclaringType) &&
                other.m_property.Name.Equals(this.m_property.Name));
        } 

        ///  
        /// Overrides the default hashcode function. 
        /// Simply returns the hashcode for the property instead
        ///  
        /// 
        public override int GetHashCode()
        {
            return m_property.Name.GetHashCode(); 
        }
        ///  
        /// 
        /// 
        ///  
        public override string ToString()
        {
            return m_property.Name;
        } 
    }
 
    ///  
    /// A TypeId propertyref represents a reference to the TypeId property
    /// of a type (complex type, entity type etc.) 
    /// 
    internal class TypeIdPropertyRef : PropertyRef
    {
        private TypeIdPropertyRef() : base() { } 

        ///  
        /// Gets the default instance of this type 
        /// 
        internal static TypeIdPropertyRef Instance = new TypeIdPropertyRef(); 

        /// 
        /// Friendly string for debugging.
        ///  
        public override string ToString()
        { 
            return "TYPEID"; 
        }
 
    }

    /// 
    /// An NullSentinel propertyref represents the NullSentinel property for 
    /// a row type.
    /// As with TypeId, this class is a singleton instance 
    ///  
    internal class NullSentinelPropertyRef : PropertyRef
    { 
        private static NullSentinelPropertyRef s_singleton = new NullSentinelPropertyRef();
        private NullSentinelPropertyRef() : base() { }

        ///  
        /// Gets the singleton instance
        ///  
        internal static NullSentinelPropertyRef Instance 
        {
            get { return s_singleton; } 
        }
        /// 
        ///
        ///  
        /// 
        public override string ToString() 
        { 
            return "NULLSENTINEL";
        } 

    }

    ///  
    /// An EntitySetId propertyref represents the EntitySetId property for
    /// an entity type or a ref type. 
    /// As with TypeId, this class is a singleton instance 
    /// 
    internal class EntitySetIdPropertyRef : PropertyRef 
    {
        private EntitySetIdPropertyRef() : base() { }

        ///  
        /// Gets the singleton instance
        ///  
        internal static EntitySetIdPropertyRef Instance = new EntitySetIdPropertyRef(); 

        ///  
        ///
        /// 
        /// 
        public override string ToString() 
        {
            return "ENTITYSETID"; 
        } 

    } 

    /// 
    /// A nested propertyref describes a nested property access - think "a.b.c"
    ///  
    internal class NestedPropertyRef : PropertyRef
    { 
        private readonly PropertyRef m_inner; 
        private readonly PropertyRef m_outer;
 
        /// 
        /// Basic constructor.
        /// Represents the access of property "propertyRef" within property "property"
        ///  
        /// the inner property
        /// the outer property 
        internal NestedPropertyRef(PropertyRef innerProperty, PropertyRef outerProperty) 
        {
            PlanCompiler.Assert(!(innerProperty is NestedPropertyRef), "innerProperty cannot be a NestedPropertyRef"); 
            m_inner = innerProperty;
            m_outer = outerProperty;
        }
 
        /// 
        /// the nested property 
        ///  
        internal PropertyRef OuterProperty { get { return m_outer; } }
 
        /// 
        /// the parent property
        /// 
        internal PropertyRef InnerProperty { get { return m_inner; } } 

        ///  
        /// Overrides the default equality function. Two NestedPropertyRefs are 
        /// equal if the have the same property name, and the types are the same
        ///  
        /// 
        /// 
        public override bool Equals(object obj)
        { 
            NestedPropertyRef other = obj as NestedPropertyRef;
            return (other != null && 
                m_inner.Equals(other.m_inner) && 
                m_outer.Equals(other.m_outer));
        } 

        /// 
        /// Overrides the default hashcode function. Simply adds the hashcodes
        /// of the "property" and "propertyRef" fields 
        /// 
        ///  
        public override int GetHashCode() 
        {
            return m_inner.GetHashCode() ^ m_outer.GetHashCode(); 
        }
        /// 
        ///
        ///  
        /// 
        public override string ToString() 
        { 
            return m_inner + "." + m_outer;
        } 
    }

    /// 
    /// A reference to "all" properties of a type 
    /// 
    internal class AllPropertyRef : PropertyRef 
    { 
        private AllPropertyRef() : base() { }
 
        /// 
        /// Get the singleton instance
        /// 
        internal static AllPropertyRef Instance = new AllPropertyRef(); 

        ///  
        /// Create a nested property ref, with "p" as the prefix 
        /// 
        /// the property to prefix with 
        /// the nested property reference
        internal override PropertyRef CreateNestedPropertyRef(PropertyRef p)
        {
            return p; 
        }
        ///  
        /// 
        /// 
        ///  
        public override string ToString()
        {
            return "ALL";
        } 
    }
 
    ///  
    /// A rel-property ref - represents a rel property of the type
    ///  
    internal class RelPropertyRef : PropertyRef
    {
#region private state
        private InternalTrees.RelProperty m_property; 
#endregion
 
        #region constructor 
        /// 
        /// Simple constructor 
        /// 
        /// the property metadata
        internal RelPropertyRef(InternalTrees.RelProperty property)
        { 
            m_property = property;
        } 
        #endregion 

        #region public apis 
        /// 
        /// Gets the property metadata
        /// 
        internal InternalTrees.RelProperty Property { get { return m_property; } } 

        ///  
        /// Overrides the default equality function. Two RelPropertyRefs are 
        /// equal, if they describe the same property
        ///  
        /// the other object to compare to
        /// true, if the objects are equal
        public override bool Equals(object obj)
        { 
            RelPropertyRef other = obj as RelPropertyRef;
            return (other != null && 
                m_property.Equals(other.m_property)); 
        }
 
        /// 
        /// Overrides the default hashcode function.
        /// Simply returns the hashcode for the property instead
        ///  
        /// hashcode for the relpropertyref
        public override int GetHashCode() 
        { 
            return m_property.GetHashCode();
        } 

        /// 
        /// debugging support
        ///  
        /// 
        public override string ToString() 
        { 
            return m_property.ToString();
        } 
        #endregion
    }

    ///  
    /// Represents a collection of property references
    ///  
    internal class PropertyRefList 
    {
        private Dictionary m_propertyReferences; 
        private bool m_allProperties;

        /// 
        /// Get something that represents "all" property references 
        /// 
        internal static PropertyRefList All = new PropertyRefList(true); 
 
        /// 
        /// Trivial constructor 
        /// 
        internal PropertyRefList() : this(false) {}

        private PropertyRefList(bool allProps) 
        {
            this.m_propertyReferences = new Dictionary(); 
 
            if (allProps)
            { 
                MakeAllProperties();
            }
        }
        private void MakeAllProperties() 
        {
            m_allProperties = true; 
            m_propertyReferences.Clear(); 
            m_propertyReferences.Add(AllPropertyRef.Instance, AllPropertyRef.Instance);
        } 

        /// 
        /// Add a new property reference to this list
        ///  
        /// new property reference
        internal void Add(PropertyRef property) 
        { 
            if (m_allProperties)
                return; 
            else if (property is AllPropertyRef)
                MakeAllProperties();
            else
                m_propertyReferences[property] = property; 
        }
        ///  
        /// Append an existing list of property references to myself 
        /// 
        /// list of property references 
        internal void Append(PropertyRefList propertyRefs)
        {
            if (m_allProperties)
                return; 
            foreach (PropertyRef p in propertyRefs.m_propertyReferences.Keys)
            { 
                this.Add(p); 
            }
        } 

        /// 
        /// Do I contain "all" properties?
        ///  
        internal bool AllProperties { get { return m_allProperties; } }
 
        ///  
        /// Create a clone of myself
        ///  
        /// a clone of myself
        internal PropertyRefList Clone()
        {
            PropertyRefList newProps = new PropertyRefList(m_allProperties); 
            foreach (PropertyRef p in this.m_propertyReferences.Keys)
                newProps.Add(p); 
            return newProps; 
        }
 
        /// 
        /// Do I contain the specifed property?
        /// 
        /// The property 
        /// true, if I do
        internal bool Contains(PropertyRef p) 
        { 
            return m_allProperties || m_propertyReferences.ContainsKey(p);
        } 

        /// 
        /// Get the list of all properties
        ///  
        internal IEnumerable Properties
        { 
            get { return m_propertyReferences.Keys; } 
        }
 
        /// 
        ///
        /// 
        ///  
        public override string ToString()
        { 
            string x = "{"; 
            foreach (PropertyRef p in m_propertyReferences.Keys)
                x += p.ToString() + ","; 
            x += "}";
            return x;
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner  [....]
// @backupOwner [....] 
//--------------------------------------------------------------------- 

using System; 
using System.Collections.Generic;
//using System.Diagnostics; // Please use PlanCompiler.Assert instead of Debug.Assert in this class...
using System.Globalization;
 
using System.Data.Common;
using md = System.Data.Metadata.Edm; 
 
//
// The PropertyRef class (and its subclasses) represent references to a property 
// of a type.
// The PropertyRefList class represents a list of expected properties
// where each property from the type is described as a PropertyRef
// 
// These classes are used by the StructuredTypeEliminator module as part of
// eliminating all structured types. The basic idea of this module is that all 
// structured types are flattened out into a single level. To avoid a large amount 
// of potentially unnecessary information, we try to identify what pieces of information
// are really necessary at each node of the tree. This is where PropertyRef comes in. 
// A PropertyRef (and more generally, a PropertyRefList) identifies a list of
// properties, and can be attached to a node/var to indicate that these were the
// only desired properties.
// 
namespace System.Data.Query.PlanCompiler
{ 
    ///  
    /// A PropertyRef class encapsulates a reference to one or more properties of
    /// a complex instance - a record type, a complex type or an entity type. 
    /// A PropertyRef may be of the following kinds.
    ///   - a simple property reference (just a reference to a simple property)
    ///   - a typeid reference - applies only to entitytype and complextypes
    ///   - an entitysetid reference - applies only to ref and entity types 
    ///   - a nested property reference (a reference to a nested property - a.b)
    ///   - an "all" property reference (all properties) 
    ///  
    internal abstract class PropertyRef
    { 
        /// 
        /// trivial constructor
        /// 
        internal PropertyRef() { } 

        ///  
        /// Create a nested property ref, with "p" as the prefix. 
        /// The best way to think of this function as follows.
        /// Consider a type T where "this" describes a property X on T. Now 
        /// consider a new type S, where "p" is a property of S and is of type T.
        /// This function creates a PropertyRef that describes the same property X
        /// from S.p instead
        ///  
        /// the property to prefix with
        /// the nested property reference 
        internal virtual PropertyRef CreateNestedPropertyRef(PropertyRef p) 
        {
            return new NestedPropertyRef(p, this); 
        }

        /// 
        /// Create a nested property ref for a simple property. Delegates to the function 
        /// above
        ///  
        /// the simple property 
        /// a nestedPropertyRef
        internal PropertyRef CreateNestedPropertyRef(md.EdmMember p) 
        {
            return CreateNestedPropertyRef(new SimplePropertyRef(p));
        }
 
        /// 
        /// Creates a nested property ref for a rel-property. Delegates to the function above 
        ///  
        /// the rel-property
        /// a nested property ref 
        internal PropertyRef CreateNestedPropertyRef(InternalTrees.RelProperty p)
        {
            return CreateNestedPropertyRef(new RelPropertyRef(p));
        } 

        ///  
        /// The tostring method for easy debuggability 
        /// 
        ///  
        public override string ToString()
        {
            return "";
        } 
    }
 
    ///  
    /// A "simple" property ref - represents a simple property of the type
    ///  
    internal class SimplePropertyRef : PropertyRef
    {
        private md.EdmMember m_property;
 
        /// 
        /// Simple constructor 
        ///  
        /// the property metadata
        internal SimplePropertyRef(md.EdmMember property) 
        {
            m_property = property;
        }
 
        /// 
        /// Gets the property metadata 
        ///  
        internal md.EdmMember Property { get { return m_property; } }
 
        /// 
        /// Overrides the default equality function. Two SimplePropertyRefs are
        /// equal, if they describe the same property
        ///  
        /// 
        ///  
        public override bool Equals(object obj) 
        {
            SimplePropertyRef other = obj as SimplePropertyRef; 
            return (other != null &&
                InternalTrees.Command.EqualTypes(m_property.DeclaringType, other.m_property.DeclaringType) &&
                other.m_property.Name.Equals(this.m_property.Name));
        } 

        ///  
        /// Overrides the default hashcode function. 
        /// Simply returns the hashcode for the property instead
        ///  
        /// 
        public override int GetHashCode()
        {
            return m_property.Name.GetHashCode(); 
        }
        ///  
        /// 
        /// 
        ///  
        public override string ToString()
        {
            return m_property.Name;
        } 
    }
 
    ///  
    /// A TypeId propertyref represents a reference to the TypeId property
    /// of a type (complex type, entity type etc.) 
    /// 
    internal class TypeIdPropertyRef : PropertyRef
    {
        private TypeIdPropertyRef() : base() { } 

        ///  
        /// Gets the default instance of this type 
        /// 
        internal static TypeIdPropertyRef Instance = new TypeIdPropertyRef(); 

        /// 
        /// Friendly string for debugging.
        ///  
        public override string ToString()
        { 
            return "TYPEID"; 
        }
 
    }

    /// 
    /// An NullSentinel propertyref represents the NullSentinel property for 
    /// a row type.
    /// As with TypeId, this class is a singleton instance 
    ///  
    internal class NullSentinelPropertyRef : PropertyRef
    { 
        private static NullSentinelPropertyRef s_singleton = new NullSentinelPropertyRef();
        private NullSentinelPropertyRef() : base() { }

        ///  
        /// Gets the singleton instance
        ///  
        internal static NullSentinelPropertyRef Instance 
        {
            get { return s_singleton; } 
        }
        /// 
        ///
        ///  
        /// 
        public override string ToString() 
        { 
            return "NULLSENTINEL";
        } 

    }

    ///  
    /// An EntitySetId propertyref represents the EntitySetId property for
    /// an entity type or a ref type. 
    /// As with TypeId, this class is a singleton instance 
    /// 
    internal class EntitySetIdPropertyRef : PropertyRef 
    {
        private EntitySetIdPropertyRef() : base() { }

        ///  
        /// Gets the singleton instance
        ///  
        internal static EntitySetIdPropertyRef Instance = new EntitySetIdPropertyRef(); 

        ///  
        ///
        /// 
        /// 
        public override string ToString() 
        {
            return "ENTITYSETID"; 
        } 

    } 

    /// 
    /// A nested propertyref describes a nested property access - think "a.b.c"
    ///  
    internal class NestedPropertyRef : PropertyRef
    { 
        private readonly PropertyRef m_inner; 
        private readonly PropertyRef m_outer;
 
        /// 
        /// Basic constructor.
        /// Represents the access of property "propertyRef" within property "property"
        ///  
        /// the inner property
        /// the outer property 
        internal NestedPropertyRef(PropertyRef innerProperty, PropertyRef outerProperty) 
        {
            PlanCompiler.Assert(!(innerProperty is NestedPropertyRef), "innerProperty cannot be a NestedPropertyRef"); 
            m_inner = innerProperty;
            m_outer = outerProperty;
        }
 
        /// 
        /// the nested property 
        ///  
        internal PropertyRef OuterProperty { get { return m_outer; } }
 
        /// 
        /// the parent property
        /// 
        internal PropertyRef InnerProperty { get { return m_inner; } } 

        ///  
        /// Overrides the default equality function. Two NestedPropertyRefs are 
        /// equal if the have the same property name, and the types are the same
        ///  
        /// 
        /// 
        public override bool Equals(object obj)
        { 
            NestedPropertyRef other = obj as NestedPropertyRef;
            return (other != null && 
                m_inner.Equals(other.m_inner) && 
                m_outer.Equals(other.m_outer));
        } 

        /// 
        /// Overrides the default hashcode function. Simply adds the hashcodes
        /// of the "property" and "propertyRef" fields 
        /// 
        ///  
        public override int GetHashCode() 
        {
            return m_inner.GetHashCode() ^ m_outer.GetHashCode(); 
        }
        /// 
        ///
        ///  
        /// 
        public override string ToString() 
        { 
            return m_inner + "." + m_outer;
        } 
    }

    /// 
    /// A reference to "all" properties of a type 
    /// 
    internal class AllPropertyRef : PropertyRef 
    { 
        private AllPropertyRef() : base() { }
 
        /// 
        /// Get the singleton instance
        /// 
        internal static AllPropertyRef Instance = new AllPropertyRef(); 

        ///  
        /// Create a nested property ref, with "p" as the prefix 
        /// 
        /// the property to prefix with 
        /// the nested property reference
        internal override PropertyRef CreateNestedPropertyRef(PropertyRef p)
        {
            return p; 
        }
        ///  
        /// 
        /// 
        ///  
        public override string ToString()
        {
            return "ALL";
        } 
    }
 
    ///  
    /// A rel-property ref - represents a rel property of the type
    ///  
    internal class RelPropertyRef : PropertyRef
    {
#region private state
        private InternalTrees.RelProperty m_property; 
#endregion
 
        #region constructor 
        /// 
        /// Simple constructor 
        /// 
        /// the property metadata
        internal RelPropertyRef(InternalTrees.RelProperty property)
        { 
            m_property = property;
        } 
        #endregion 

        #region public apis 
        /// 
        /// Gets the property metadata
        /// 
        internal InternalTrees.RelProperty Property { get { return m_property; } } 

        ///  
        /// Overrides the default equality function. Two RelPropertyRefs are 
        /// equal, if they describe the same property
        ///  
        /// the other object to compare to
        /// true, if the objects are equal
        public override bool Equals(object obj)
        { 
            RelPropertyRef other = obj as RelPropertyRef;
            return (other != null && 
                m_property.Equals(other.m_property)); 
        }
 
        /// 
        /// Overrides the default hashcode function.
        /// Simply returns the hashcode for the property instead
        ///  
        /// hashcode for the relpropertyref
        public override int GetHashCode() 
        { 
            return m_property.GetHashCode();
        } 

        /// 
        /// debugging support
        ///  
        /// 
        public override string ToString() 
        { 
            return m_property.ToString();
        } 
        #endregion
    }

    ///  
    /// Represents a collection of property references
    ///  
    internal class PropertyRefList 
    {
        private Dictionary m_propertyReferences; 
        private bool m_allProperties;

        /// 
        /// Get something that represents "all" property references 
        /// 
        internal static PropertyRefList All = new PropertyRefList(true); 
 
        /// 
        /// Trivial constructor 
        /// 
        internal PropertyRefList() : this(false) {}

        private PropertyRefList(bool allProps) 
        {
            this.m_propertyReferences = new Dictionary(); 
 
            if (allProps)
            { 
                MakeAllProperties();
            }
        }
        private void MakeAllProperties() 
        {
            m_allProperties = true; 
            m_propertyReferences.Clear(); 
            m_propertyReferences.Add(AllPropertyRef.Instance, AllPropertyRef.Instance);
        } 

        /// 
        /// Add a new property reference to this list
        ///  
        /// new property reference
        internal void Add(PropertyRef property) 
        { 
            if (m_allProperties)
                return; 
            else if (property is AllPropertyRef)
                MakeAllProperties();
            else
                m_propertyReferences[property] = property; 
        }
        ///  
        /// Append an existing list of property references to myself 
        /// 
        /// list of property references 
        internal void Append(PropertyRefList propertyRefs)
        {
            if (m_allProperties)
                return; 
            foreach (PropertyRef p in propertyRefs.m_propertyReferences.Keys)
            { 
                this.Add(p); 
            }
        } 

        /// 
        /// Do I contain "all" properties?
        ///  
        internal bool AllProperties { get { return m_allProperties; } }
 
        ///  
        /// Create a clone of myself
        ///  
        /// a clone of myself
        internal PropertyRefList Clone()
        {
            PropertyRefList newProps = new PropertyRefList(m_allProperties); 
            foreach (PropertyRef p in this.m_propertyReferences.Keys)
                newProps.Add(p); 
            return newProps; 
        }
 
        /// 
        /// Do I contain the specifed property?
        /// 
        /// The property 
        /// true, if I do
        internal bool Contains(PropertyRef p) 
        { 
            return m_allProperties || m_propertyReferences.ContainsKey(p);
        } 

        /// 
        /// Get the list of all properties
        ///  
        internal IEnumerable Properties
        { 
            get { return m_propertyReferences.Keys; } 
        }
 
        /// 
        ///
        /// 
        ///  
        public override string ToString()
        { 
            string x = "{"; 
            foreach (PropertyRef p in m_propertyReferences.Keys)
                x += p.ToString() + ","; 
            x += "}";
            return x;
        }
    } 
}

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

                        

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