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TaskFactory.ContinueWhenAll<TAntecedentResult> Method (Task<TAntecedentResult>[], Action<Task<TAntecedentResult>[]>, CancellationToken, TaskContinuationOptions, TaskScheduler)

Creates a continuation task that will be started upon the completion of a set of provided tasks.

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

public Task ContinueWhenAll<TAntecedentResult>(
	Task<TAntecedentResult>[] tasks,
	Action<Task<TAntecedentResult>[]> continuationAction,
	CancellationToken cancellationToken,
	TaskContinuationOptions continuationOptions,
	TaskScheduler scheduler

Type Parameters


The type of the result of the antecedent tasks.


Type: System.Threading.Tasks.Task<TAntecedentResult>[]
The array of tasks from which to continue.
Type: System.Action<Task<TAntecedentResult>[]>
The action delegate to execute when all tasks in the tasks array have completed.
Type: System.Threading.CancellationToken
The cancellation token that will be assigned to the new continuation task.
Type: System.Threading.Tasks.TaskContinuationOptions
The TaskContinuationOptions value that controls the behavior of the created continuation Task.
Type: System.Threading.Tasks.TaskScheduler
The scheduler for the created continuation task.

Return Value

Type: System.Threading.Tasks.Task
The new continuation task.


The tasks array is null.


The continuationAction argument is null.


The scheduler argument is null.


The tasks array contains a null value.


The tasks array is empty.

The NotOn* and OnlyOn* TaskContinuationOptions, which constrain for which TaskStatus states a continuation will be executed, are illegal with ContinueWhenAll.

.NET Framework

Supported in: 4

.NET Framework Client Profile

Supported in: 4

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.