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Task.ContinueWith(TResult) Method (Func(Task, Object, TResult), Object, CancellationToken)

.NET Framework 4.6 and 4.5

Creates a continuation that executes asynchronously when the target Task completes and returns a value. The continuation receives caller-supplied state information and a cancellation token.

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

member ContinueWith : 
        continuationFunction:Func<Task, Object, 'TResult> * 
        state:Object * 
        cancellationToken:CancellationToken -> Task<'TResult> 

Type Parameters


The type of the result produced by the continuation.


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.

Return Value

Type: System.Threading.Tasks.Task(TResult)
A new continuation Task(TResult).


The continuationFunction argument is a null reference (Nothing in Visual Basic).


The provided CancellationToken has already been disposed.

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.

.NET Framework

Supported in: 4.6, 4.5

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8
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