Assembly: System (in system.dll)
OperationCompleted has been called previously for this task.
Call the OperationCompleted method to end the lifetime of an asynchronous operation. After this method is called for a particular task, calls to its corresponding AsyncOperation will raise an exception.
Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter EditionThe Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.