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AbandonedMutexException Class

July 28, 2014

The exception that is thrown when one thread acquires a Mutex object that another thread has abandoned by exiting without releasing it.

System.Object
  System.Exception
    System.SystemException
      System.Threading.AbandonedMutexException

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

public class AbandonedMutexException : SystemException

The AbandonedMutexException type exposes the following members.

  NameDescription
Public methodAbandonedMutexException()Initializes a new instance of the AbandonedMutexException class with default values.
Public methodAbandonedMutexException(String)Initializes a new instance of the AbandonedMutexException class with a specified error message.
Public methodAbandonedMutexException(Int32, WaitHandle)Initializes a new instance of the AbandonedMutexException class with a specified index for the abandoned mutex, if applicable, and a Mutex object that represents the mutex.
Public methodAbandonedMutexException(String, Exception)Initializes a new instance of the AbandonedMutexException class with a specified error message and inner exception.
Public methodAbandonedMutexException(String, Int32, WaitHandle)Initializes a new instance of the AbandonedMutexException class with a specified error message, the index of the abandoned mutex, if applicable, and the abandoned mutex.
Public methodAbandonedMutexException(String, Exception, Int32, WaitHandle)Initializes a new instance of the AbandonedMutexException class with a specified error message, the inner exception, the index for the abandoned mutex, if applicable, and a Mutex object that represents the mutex.
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  NameDescription
Public propertyDataGets a collection of key/value pairs that provide additional user-defined information about the exception. (Inherited from Exception.)
Public propertyHelpLinkGets or sets a link to the help file associated with this exception. (Inherited from Exception.)
Public propertyHResultGets or sets HRESULT, a coded numerical value that is assigned to a specific exception. (Inherited from Exception.)
Public propertyInnerExceptionGets the Exception instance that caused the current exception. (Inherited from Exception.)
Public propertyMessageGets a message that describes the current exception. (Inherited from Exception.)
Public propertyMutexGets the abandoned mutex that caused the exception, if known.
Public propertyMutexIndexGets the index of the abandoned mutex that caused the exception, if known.
Public propertySourceGets or sets the name of the application or the object that causes the error. (Inherited from Exception.)
Public propertyStackTraceGets a string representation of the frames on the call stack at the time the current exception was thrown. (Inherited from Exception.)
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  NameDescription
Public methodEquals(Object)Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetBaseExceptionWhen overridden in a derived class, returns the Exception that is the root cause of one or more subsequent exceptions. (Inherited from Exception.)
Public methodGetHashCodeServes as a hash function for a particular type. (Inherited from Object.)
Public methodGetTypeGets the runtime type of the current instance. (Inherited from Exception.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodToStringCreates and returns a string representation of the current exception. (Inherited from Exception.)
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When a thread abandons a mutex, the exception is thrown in the next thread that acquires the mutex. The thread might acquire the mutex because it was already waiting on the mutex or because it enters the mutex at a later time.

An abandoned mutex indicates a serious programming error. When a thread exits without releasing the mutex, the data structures protected by the mutex might not be in a consistent state. Prior to version 2.0 of the .NET Framework, such problems were hard to discover because no exception was thrown if a wait completed as the result of an abandoned mutex. For more information, see the Mutex class.

The next thread to request ownership of the mutex can handle this exception and proceed, provided that the integrity of the data structures can be verified.

The following code example executes a thread that abandons five mutexes, demonstrating their effects on the WaitOne, WaitAny, and WaitAll methods. The value of the MutexIndex property is displayed for the WaitAny call.

NoteNote:

The call to the WaitAny method is interrupted by one of the abandoned mutexes. The other abandoned mutex could still cause an AbandonedMutexException to be thrown by subsequent wait methods.

Windows Phone OS

Supported in: 8.1, 8.0

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

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