ContinueWhenAny(TResult) Method (Task[], Func(Task, TResult))
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TaskFactory.ContinueWhenAny<TResult> Method (Task[], Func<Task, TResult>)


Creates a continuation Task<TResult> that will be started upon the completion of any Task in the provided set.

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

public Task<TResult> ContinueWhenAny<TResult>(
	Task[] tasks,
	Func<Task, TResult> continuationFunction


Type: System.Threading.Tasks.Task[]

The array of tasks from which to continue when one task completes.

Type: System.Func<Task, TResult>

The function delegate to execute asynchronously when one task in the tasks array completes.

Return Value

Type: System.Threading.Tasks.Task<TResult>

The new continuation Task<TResult>.

Type Parameters


The type of the result that is returned by the continuationFunction delegate and associated with the created Task<TResult>.

Exception Condition

The exception that is thrown when one of the elements in the tasks array has been disposed.


The exception that is thrown when the tasks array is null.


The exception that is thrown when the continuationFunction argument is null.


The exception that is thrown when the tasks array contains a null value.


The exception that is thrown when the tasks array is empty.

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Available since 5.0
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1
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