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CommunicationObject.BeginClose Method (AsyncCallback, Object)

Begins an asynchronous operation to close a communication object.

Namespace: System.ServiceModel.Channels
Assembly: System.ServiceModel (in system.servicemodel.dll)

public IAsyncResult BeginClose (
	AsyncCallback callback,
	Object state
public final IAsyncResult BeginClose (
	AsyncCallback callback, 
	Object state
public final function BeginClose (
	callback : AsyncCallback, 
	state : Object
) : IAsyncResult
Not applicable.



The AsyncCallback delegate that receives notification of the completion of the asynchronous close operation.


An object, specified by the application, that contains state information associated with the asynchronous close operation.

Return Value

The IAsyncResult that references the asynchronous close operation.

Exception typeCondition


BeginClose was called on an object in the Faulted state.


The default interval of time that was allotted for the operation was exceeded before the operation was completed.

This method causes the CommunicationObject to gracefully transition from any state, other than the Closed state, into the Closed state within a default interval of time. The BeginClose method allows any unfinished work to be completed before returning. For example, finish sending any buffered messages). This method calls OnBeginOpen if the communication object was initially in the Opened state.

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.

.NET Framework

Supported in: 3.0
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