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RequestCollection.System.Collections.IEnumerable.GetEnumerator Method

Returns an enumerator that iterates through the current collection.

Namespace: Microsoft.Web.Administration
Assembly: Microsoft.Web.Administration (in microsoft.web.administration.dll)

Syntax

'Declaration
Private Function System.Collections.IEnumerable.GetEnumerator As IEnumerator Implements IEnumerable.GetEnumerator
'Usage
Dim instance As RequestCollection
Dim returnValue As IEnumerator

returnValue = CType(instance, IEnumerable).GetEnumerator
IEnumerator IEnumerable.GetEnumerator ()
private:
virtual IEnumerator^ System.Collections.IEnumerable.GetEnumerator () sealed = IEnumerable::GetEnumerator
Not applicable.

Return Value

An IEnumerator object that can be used to iterate through the collection.

Remarks

The foreach statement of the C# language (For Each in Visual Basic) hides the complexity of the enumerators. Therefore, using foreach is recommended, instead of directly manipulating the enumerator.

Enumerators can be used to read the data in the collection, but they cannot be used to modify the underlying collection.

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 its behavior is undefined.

The enumerator does not have exclusive access to the collection; therefore, enumerating through a collection is intrinsically not a thread-safe procedure. To guarantee thread safety during enumeration, you can lock the collection during the entire enumeration. To allow the collection to be accessed by multiple threads for reading and writing, you must implement your own synchronization.

Platforms

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

Version Information

.NET Framework

Supported in: 3.0

See Also

Reference

RequestCollection Class
RequestCollection Members
Microsoft.Web.Administration Namespace