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DuplicateWaitObjectException Class

The exception that is thrown when an object appears more than once in an array of synchronization objects.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

public class DuplicateWaitObjectException : ArgumentException

The common language runtime provides a thread synchronization mechanism based on synchronization objects waiting for execution in an array of WaitHandle objects. If the array of WaitHandle objects passed to WaitAll or WaitAny contains any duplicate operating system handles, DuplicateWaitObjectException is thrown. For more information, see WaitHandle.

DuplicateWaitObjectException uses the HRESULT COR_E_DUPLICATEWAITOBJECT, which has the value 0x80131529.

For a list of initial property values for an instance of DuplicateWaitObjectException, see the DuplicateWaitObjectException constructors.


Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0