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IEnumerator.MoveNext Method

Advances the enumerator to the next element of the collection.

[Visual Basic]
Function MoveNext() As Boolean
bool MoveNext();
bool MoveNext();
function MoveNext() : Boolean;

Return Value

true if the enumerator was successfully advanced to the next element; false if the enumerator has passed the end of the collection.


Exception Type Condition
InvalidOperationException The collection was modified after the enumerator was created.


After an enumerator is created or after a call to Reset, an enumerator is positioned before the first element of the collection, and the first call to MoveNext moves the enumerator over the first element of the collection.

After the end of the collection is passed, subsequent calls to MoveNext return false until Reset is called.

An enumerator remains valid as long as the collection remains unchanged. If changes are made to the collection, such as adding, modifying or deleting elements, the enumerator is irrecoverably invalidated and the next call to MoveNext or Reset throws an InvalidOperationException.


Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, .NET Compact Framework, Common Language Infrastructure (CLI) Standard

See Also

IEnumerator Interface | IEnumerator Members | System.Collections Namespace | Current | Reset