Task.WaitAny Method (Task[])

Waits for any of the provided Task objects to complete execution.

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

public static int WaitAny(
	params Task[] tasks
)

Parameters

tasks
Type: System.Threading.Tasks.Task[]

An array of Task instances on which to wait.

Return Value

Type: System.Int32
The index of the completed task in the tasks array argument.

ExceptionCondition
ObjectDisposedException

The Task has been disposed.

ArgumentNullException

The tasks argument is null.

ArgumentException

The tasks argument contains a null element.

The following example demonstrates using WaitAny to wait for any task in a set of tasks to complete.

// C#

var t1 = Task.Factory.StartNew(() => DoOperation1());

var t2 = Task.Factory.StartNew(() => DoOperation2());

Task.WaitAny(t1, t2)

' Visual Basic

Dim t1 = Task.Factory.StartNew(Sub()

DoOperation1()

End Sub)

Dim t2 = Task.Factory.StartNew(Sub()

DoOperation2()

End Sub)

Task.WaitAny(t1, t2)

.NET Framework

Supported in: 4.6, 4.5, 4

.NET Framework Client Profile

Supported in: 4

Portable Class Library

Supported in: Portable Class Library

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8
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