56 lines
2.1 KiB
C#
56 lines
2.1 KiB
C#
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// ==++==
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// ==--==
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/*============================================================
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**
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** Interface: IEnumerator
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**
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**
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** Purpose: Base interface for all enumerators.
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**
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** Date: June 14, 1999
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**
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===========================================================*/
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namespace System.Collections {
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using System;
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using System.Runtime.InteropServices;
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// Base interface for all enumerators, providing a simple approach
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// to iterating over a collection.
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//| <include path='docs/doc[@for="IEnumerator"]/*' />
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[Guid("496B0ABF-CDEE-11d3-88E8-00902754C43A")]
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public interface IEnumerator
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{
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// Advances the enumerator to the next element of the enumeration and
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// returns a boolean indicating whether an element is available. Upon
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// creation, an enumerator is conceptually positioned before the first
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// element of the enumeration, and the first call to MoveNext
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// brings the first element of the enumeration into view.
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//
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//| <include path='docs/doc[@for="IEnumerator.MoveNext"]/*' />
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bool MoveNext();
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// Returns the current element of the enumeration. The returned value is
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// undefined before the first call to MoveNext and following a
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// call to MoveNext that returned false. Multiple calls to
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// GetCurrent with no intervening calls to MoveNext
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// will return the same object.
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//
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//| <include path='docs/doc[@for="IEnumerator.Current"]/*' />
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Object Current {
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get;
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}
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// Resets the enumerator to the beginning of the enumeration, starting over.
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// The preferred behavior for Reset is to return the exact same enumeration.
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// This means if you modify the underlying collection then call Reset, your
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// IEnumerator will be invalid, just as it would have been if you had called
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// MoveNext or Current.
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//
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//| <include path='docs/doc[@for="IEnumerator.Reset"]/*' />
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void Reset();
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}
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}
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