Task.WaitAll Method (Task[], Int32, CancellationToken)
Waits for all of the provided Task objects to complete execution within a specified number of milliseconds or until the wait is cancelled.
Assembly: mscorlib (in mscorlib.dll)
static member WaitAll : tasks:Task[] * millisecondsTimeout:int * cancellationToken:CancellationToken -> bool
Parameters
- tasks
-
Type:
System.Threading.Tasks.Task[]
An array of Task instances on which to wait.
- millisecondsTimeout
-
Type:
System.Int32
The number of milliseconds to wait, or Infinite (-1) to wait indefinitely.
- cancellationToken
-
Type:
System.Threading.CancellationToken
A CancellationToken to observe while waiting for the tasks to complete.
Return Value
Type: System.Booleantrue if all of the Task instances completed execution within the allotted time; otherwise, false.
| Exception | Condition |
|---|---|
| ObjectDisposedException | One or more of the Task objects in tasks has been disposed. |
| 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. |
| ArgumentOutOfRangeException | millisecondsTimeout is a negative number other than -1, which represents an infinite time-out. |
| ArgumentException | The tasks argument contains a null element. -or- The tasks argument is an empty array. |
| OperationCanceledException | The cancellationToken was canceled. |
The cancellationToken argument is used to cancel the wait operation. Cancellation of the tasks is a distinct operation, and is signaled by the AggregateException noted above.
Available since 8
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 5.0
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1