WaitAll Method (Task[], Int32, CancellationToken)
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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.

Namespace:   System.Threading.Tasks
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.Boolean

true 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.

Universal Windows Platform
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
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