SemaphoreSlim.WaitAsync Method (TimeSpan, CancellationToken)

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

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

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


Public Function WaitAsync ( _
    timeout As TimeSpan, _
    cancellationToken As CancellationToken _
) As Task(Of Boolean)
public Task<bool> WaitAsync(
    TimeSpan timeout,
    CancellationToken cancellationToken


Return Value

Type: System.Threading.Tasks..::.Task<(Of <(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

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


timeout is greater than MaxValue.

Version Information

Windows Phone OS

Supported in: 8.1, 8.0

See Also


SemaphoreSlim Class

WaitAsync Overload

System.Threading Namespace