ContinueWith(TResult) Method (Func(Task, Object, TResult), Object, CancellationToken, TaskContinuationOptions, TaskScheduler)
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Task.ContinueWith<TResult> Method (Func<Task, Object, TResult>, Object, CancellationToken, TaskContinuationOptions, TaskScheduler)

.NET Framework 4.6 and 4.5

Creates a continuation that executes based on the specified task continuation options when the target Task completes and returns a value. The continuation receives caller-supplied state information and a cancellation token and uses the specified scheduler.

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

public Task<TResult> ContinueWith<TResult>(
	Func<Task, object, TResult> continuationFunction,
	object state,
	CancellationToken cancellationToken,
	TaskContinuationOptions continuationOptions,
	TaskScheduler scheduler


Type: System.Func<Task, Object, TResult>

A function to run when the Task completes. When run, the delegate will be passed the completed task and the caller-supplied state object as arguments.

Type: System.Object

An object representing data to be used by the continuation function.

Type: System.Threading.CancellationToken

The CancellationToken that will be assigned to the new continuation task.

Type: System.Threading.Tasks.TaskContinuationOptions

Options for when the continuation is scheduled and how it behaves. This includes criteria, such as OnlyOnCanceled, as well as execution options, such as ExecuteSynchronously.

Type: System.Threading.Tasks.TaskScheduler

The TaskScheduler to associate with the continuation task and to use for its execution.

Return Value

Type: System.Threading.Tasks.Task<TResult>

A new continuation Task<TResult>.

Type Parameters


The type of the result produced by the continuation.

Exception Condition

The continuationFunction argument is null.


The continuationOptions argument specifies an invalid value for TaskContinuationOptions.


The scheduler argument is null.


The provided CancellationToken has already been disposed.

The returned Task<TResult> will not be scheduled for execution until the current task has completed. If the criteria specified through the continuationOptions parameter are not met, the continuation task will be canceled instead of scheduled.

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 4.5
Portable Class Library
Supported in: portable .NET platforms
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1
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