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