SemaphoreSlim.Release Method (Int32)

.NET Framework (current version)

Releases the SemaphoreSlim object a specified number of times.

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

Public Function Release (
	releaseCount As Integer
) As Integer


Type: System.Int32

The number of times to exit the semaphore.

Return Value

Type: System.Int32

The previous count of the SemaphoreSlim.

Exception Condition

The current instance has already been disposed.


releaseCount is less than 1.


The SemaphoreSlim has already reached its maximum size.

A call to the Release(Int32) method increments the CurrentCount property by releaseCount. If the value of the CurrentCount property is zero before this method is called, the method also allows releaseCount threads or tasks blocked by a call to the Wait or WaitAsync method to enter the semaphore.

Universal Windows Platform
Available since 8
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1
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