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

Microsoft Silverlight will reach end of support after October 2021. Learn more.

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

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

Syntax

'Declaration
Public Function ContinueWith(Of TNewResult) ( _
    continuationFunction As Func(Of Task(Of TResult), TNewResult), _
    cancellationToken As CancellationToken _
) As Task(Of TNewResult)

public Task<TNewResult> ContinueWith<TNewResult>(
    Func<Task<TResult>, TNewResult> continuationFunction,
    CancellationToken cancellationToken
)

Type Parameters

  • TNewResult
    The type of the result produced by the continuation.

Parameters

  • continuationFunction
    Type: System.Func<Task<TResult>, TNewResult>
    A function to run when the Task<TResult> completes. When run, the delegate will be passed the completed task as an argument.

Return Value

Type: System.Threading.Tasks.Task<TNewResult>
A new continuation Task<TResult>.

Exceptions

Exception Condition
ObjectDisposedException

The Task<TResult> has been disposed.

-or-

The CancellationTokenSource that created cancellationToken has already been disposed.
ArgumentNullException

The continuationFunction argument is null.

Remarks

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.

Version Information

Silverlight

Supported in: 5

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Change History

Date

History

Reason

Added text to clarify asynchronous execution of continuations.

Customer feedback.