Task.WaitAll Method (Task[], Int32)

Waits for all of the provided Task objects to complete execution within a specified number of milliseconds.

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

static member WaitAll : 
        tasks:Task[] * 
        millisecondsTimeout:int -> 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.

Return Value

Type: System.Boolean
true if all of the Task instances completed execution within the allotted time; otherwise, false.

ExceptionCondition
ObjectDisposedException

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

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.

ArgumentOutOfRangeException

millisecondsTimeout is a negative number other than -1, which represents an infinite time-out.

ArgumentException

The tasks argument contains a null element.

.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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