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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)

public static void WaitAll(
	Task[] tasks,
	CancellationToken cancellationToken
)

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 null.

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

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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