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WaitAll Method (Task[], CancellationToken)

Task.WaitAll Method (Task[], CancellationToken)

Waits for all of the provided Task objects to complete execution unless the wait is cancelled.

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

static member WaitAll : 
        tasks:Task[] * 
        cancellationToken:CancellationToken -> unit

Parameters

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

An array of Task instances on which to wait.

cancellationToken
Type: System.Threading.CancellationToken

A CancellationToken to observe while waiting for the tasks to complete.

ExceptionCondition
OperationCanceledException

The cancellationToken was canceled.

ArgumentNullException

The tasks argument is a null reference (Nothing in Visual Basic).

AggregateException

At least one of the Task instances was canceled. If a task was canceled, the AggregateException contains an OperationCanceledException in its InnerExceptions collection.

-or-

An exception was thrown during the execution of at least one of the Task instances.

ArgumentException

The tasks argument contains a null element.

ObjectDisposedException

One or more of the Task objects in tasks has been disposed.

The cancellationToken argument is used to cancel the wait operation. Cancellation of the tasks is a distinct operation, and is signaled by the AggregateException as noted above.

.NET Framework

Supported in: 4.6, 4.5, 4

.NET Framework Client Profile

Supported in: 4

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Portable Class Library

Supported in: Portable Class Library
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