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SemaphoreSlim Constructor (Int32, Int32)

Initializes a new instance of the SemaphoreSlim class, specifying the initial and maximum number of requests that can be granted concurrently.

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

public SemaphoreSlim(
	int initialCount,
	int maxCount
)

Parameters

initialCount
Type: System.Int32

The initial number of requests for the semaphore that can be granted concurrently.

maxCount
Type: System.Int32

The maximum number of requests for the semaphore that can be granted concurrently.

ExceptionCondition
ArgumentOutOfRangeException

initialCount is less than 0, or initialCount is greater than maxCount, or maxCount is equal to or less than 0.

.NET Framework

Supported in: 4.6, 4.5, 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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