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TaskFactory(Of TResult).ContinueWhenAll Method (Task(), Func(Of Task(), TResult))

Creates a continuation task that will be started upon the completion of a set of provided tasks.

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

Public Function ContinueWhenAll ( _
	tasks As Task(), _
	continuationFunction As Func(Of Task(), TResult) _
) As Task(Of TResult)


Type: System.Threading.Tasks.Task()

The array of tasks from which to continue.

Type: System.Func(Of Task(), TResult)

The function delegate to execute asynchronously when all tasks in the tasks array have completed.

Return Value

Type: System.Threading.Tasks.Task(Of TResult)
The new continuation task.


One of the elements in the tasks array has been disposed.


tasks array is Nothing.


The continuationFunction is Nothing.


The tasks array contains a null value or is empty.

After completion, a task is in one of these states: RanToCompletion, Faulted, or Canceled states.

.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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