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SemaphoreSlim.AvailableWaitHandle Property

Returns a WaitHandle that can be used to wait on the semaphore.

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

public WaitHandle AvailableWaitHandle { get; }

Property Value

Type: System.Threading.WaitHandle
A WaitHandle that can be used to wait on the semaphore.

ExceptionCondition
ObjectDisposedException

The SemaphoreSlim has been disposed.

Use this property only when you must wait on a SemaphoreSlim together with other kernel-based synchronization objects with the same wait handle. A successful wait on the AvailableWaitHandle does not imply a successful wait on the SemaphoreSlim itself, nor does it decrement the semaphore's count. After the available wait handle is signaled, you should wait on the SemaphoreSlim specifically.

.NET Framework

Supported in: 4.5.3, 4

.NET Framework Client Profile

Supported in: 4

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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