Task.WaitAll Method (Task, CancellationToken)
Waits for all of the provided Task objects to complete execution unless the wait is cancelled.
Assembly: mscorlib (in mscorlib.dll)
The cancellationToken was canceled.
The tasks argument is null.
The tasks argument contains a null element.
The tasks argument is an empty array.
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.
Available since 4.5
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Available since 5.0
Windows Phone Silverlight
Available since 8.0
Available since 8.1