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

.NET Framework 4.6 and 4.5

Creates a continuation that executes when the target Task<TResult> completes.

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

public Task<TNewResult> ContinueWith<TNewResult>(
	Func<Task<TResult>, object, TNewResult> continuationFunction,
	object state,
	TaskContinuationOptions continuationOptions


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

A function to run when the Task<TResult> 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.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.

Return Value

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

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 returned Task<TResult> will not be scheduled for execution until the current task has completed, whether it completes due to running to completion successfully, faulting due to an unhandled exception, or exiting out early due to being canceled.

The continuationFunction, when executed, should return a Task<TResult>. This task's completion state will be transferred to the task returned from the ContinueWith call.

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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