SemaphoreSlim::WaitAsync Method (TimeSpan)

.NET Framework (current version)

Asynchronously waits to enter the SemaphoreSlim, using a TimeSpan to measure the time interval.

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

Task<bool>^ WaitAsync(
	TimeSpan timeout


Type: System::TimeSpan

A TimeSpan that represents the number of milliseconds to wait, or a TimeSpan that represents -1 milliseconds to wait indefinitely.

Return Value

Type: System.Threading.Tasks::Task<Boolean>^

A task that will complete with a result of true if the current thread successfully entered the SemaphoreSlim, otherwise with a result of false.

Exception Condition

The current instance has already been disposed.


millisecondsTimeout is a negative number other than -1, which represents an infinite time-out


timeout is greater than MaxValue.

Universal Windows Platform
Available since 8
.NET Framework
Available since 4.5
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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