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WaitHandleCannotBeOpenedException Class

The exception that is thrown when an attempt is made to open a system mutex or semaphore that does not exist.

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

public class WaitHandleCannotBeOpenedException : ApplicationException
/** @attribute SerializableAttribute() */ 
/** @attribute ComVisibleAttribute(false) */ 
public class WaitHandleCannotBeOpenedException extends ApplicationException
public class WaitHandleCannotBeOpenedException extends ApplicationException
Not applicable.

Instances of the Mutex class and the Semaphore class can represent named system synchronization objects. When you use the Mutex.OpenExisting method or the Semaphore.OpenExisting method to open a named system object that does not exist, a WaitHandleCannotBeOpenedException is thrown.


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 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 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, 2.0

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