43 lines
1.3 KiB
C#
43 lines
1.3 KiB
C#
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//------------------------------------------------------------------------------
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// <copyright file="EmptyCollection.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//------------------------------------------------------------------------------
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/*
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* EmptyCollection class
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*
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* Copyright (c) 1999 Microsoft Corporation
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*/
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namespace System.Web.Util {
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using System.Collections;
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/*
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* Fast implementation of an empty collection
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*/
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internal class EmptyCollection: ICollection, IEnumerator {
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private static EmptyCollection s_theEmptyCollection = new EmptyCollection();
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private EmptyCollection() { }
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// Return the same instance all the time, since it's immutable
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internal static EmptyCollection Instance { get { return s_theEmptyCollection; } }
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// ICollection implementation
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IEnumerator IEnumerable.GetEnumerator() { return this; }
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public int Count { get { return 0; } }
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bool ICollection.IsSynchronized { get { return true; } }
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object ICollection.SyncRoot { get { return this; } }
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public void CopyTo(Array array, int index) { }
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// IEnumerator implementation
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object IEnumerator.Current { get { return null; } }
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bool IEnumerator.MoveNext() { return false; }
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void IEnumerator.Reset() { }
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}
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}
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