public static Task WhenAll(
	IEnumerable<Task> tasks
)

Public Shared Function WhenAll ( 
	tasks As IEnumerable(Of Task)
) As Task

public:
static Task^ WhenAll(
	IEnumerable<Task^>^ tasks
)

static member WhenAll : 
        tasks : IEnumerable<Task> -> Task 

Parameters

tasks

Type: System.Collections.GenericIEnumerableTask
The tasks to wait on for completion.

Return Value

If any of the supplied tasks completes in a faulted state, the returned task will also complete in a Faulted state, where its exceptions will contain the aggregation of the set of unwrapped exceptions from each of the supplied tasks.

If none of the supplied tasks faulted but at least one of them was canceled, the returned task will end in the Canceled state.

If none of the tasks faulted and none of the tasks were canceled, the resulting task will end in the RanToCompletion state.

If the supplied array/enumerable contains no tasks, the returned task will immediately transition to a RanToCompletion state before it's returned to the caller.

.NET for Windows Store apps

.NET Framework

Portable Class Library

Threading Library

Reference