ImmutableCollection.cs source code in C# .NET

Source code for the .NET framework in C#

                        

Code:

/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WCF / IdentityModel / System / IdentityModel / ImmutableCollection.cs / 1305376 / ImmutableCollection.cs

                            //---------------------------------------------------------- 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------

namespace System.IdentityModel 
{
    using System; 
    using System.Collections; 
    using System.Collections.Generic;
    using System.Collections.ObjectModel; 

    //
    // A collection that can be made immutable by calling the
    // MakeReadOnly method. Once the collection is made read-only 
    // Add, Remove and Clear methods will throw an exception
    // failing to add a item to the collection. 
    // 
    internal sealed class ImmutableCollection : Collection, IList, IList
    { 
        bool isReadOnly = false;

        public void MakeReadOnly()
        { 
            this.isReadOnly = true;
        } 
 
        public bool IsReadOnly
        { 
            get { return this.isReadOnly; }
        }

        protected override void ClearItems() 
        {
            if (this.isReadOnly) 
                throw  DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.ObjectIsReadOnly))); 

            base.ClearItems(); 
        }

        protected override void InsertItem(int index, T item)
        { 
            if (this.isReadOnly)
                throw  DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.ObjectIsReadOnly))); 
 
            base.InsertItem(index, item);
        } 

        protected override void RemoveItem(int index)
        {
            if (this.isReadOnly) 
                throw  DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.ObjectIsReadOnly)));
 
            base.RemoveItem(index); 
        }
 
        protected override void SetItem(int index, T item)
        {
            if (this.isReadOnly)
                throw  DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.ObjectIsReadOnly))); 

            base.SetItem(index, item); 
        } 

        bool ICollection.IsReadOnly 
        {
            get { return this.isReadOnly; }
        }
 
        bool IList.IsReadOnly
        { 
            get { return this.isReadOnly; } 
        }
    } 
}

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

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