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Task::WaitAll Method (array<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
Assemblies:   System.Threading.Tasks (in System.Threading.Tasks.dll)
  mscorlib (in mscorlib.dll)

public:
static bool WaitAll(
	array<Task^>^ tasks, 
	int millisecondsTimeout, 
	CancellationToken cancellationToken
)

Parameters

tasks
Type: array<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.

ExceptionCondition
ObjectDisposedException

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

ArgumentNullException

The tasks argument is nullptr.

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.

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.

.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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