AbandonedMutexException Class
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
The exception that is thrown when one thread acquires a Mutex object that another thread has abandoned by exiting without releasing it.
Assembly: mscorlib (in mscorlib.dll)
The AbandonedMutexException type exposes the following members.
| Name | Description | |
|---|---|---|
 | AbandonedMutexException() | Initializes a new instance of the AbandonedMutexException class with default values. |
| AbandonedMutexException(String) | Initializes a new instance of the AbandonedMutexException class with a specified error message. |
| AbandonedMutexException(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. |
| AbandonedMutexException(String, Exception) | Initializes a new instance of the AbandonedMutexException class with a specified error message and inner exception. |
| AbandonedMutexException(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. |
| AbandonedMutexException(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. |
| Name | Description | |
|---|---|---|
 | Data | Gets a collection of key/value pairs that provide additional user-defined information about the exception. (Inherited from Exception.) |
| HelpLink | Gets or sets a link to the help file associated with this exception. (Inherited from Exception.) |
| HResult | Gets or sets HRESULT, a coded numerical value that is assigned to a specific exception. (Inherited from Exception.) |
| InnerException | Gets the Exception instance that caused the current exception. (Inherited from Exception.) |
| Message | Gets a message that describes the current exception. (Inherited from Exception.) |
| Mutex | Gets the abandoned mutex that caused the exception, if known. |
| MutexIndex | Gets the index of the abandoned mutex that caused the exception, if known. |
| Source | Gets or sets the name of the application or the object that causes the error. (Inherited from Exception.) |
| StackTrace | Gets a string representation of the frames on the call stack at the time the current exception was thrown. (Inherited from Exception.) |
| Name | Description | |
|---|---|---|
| Equals(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
 | Finalize | Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.) |
| GetBaseException | When overridden in a derived class, returns the Exception that is the root cause of one or more subsequent exceptions. (Inherited from Exception.) |
| GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
| GetType | Gets the runtime type of the current instance. (Inherited from Exception.) |
| MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
| ToString | Creates and returns a string representation of the current exception. (Inherited from Exception.) |
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.
 Note: |
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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. |