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WindowsRuntimeSystemExtensions::AsTask Method (IAsyncAction, CancellationToken)

.NET Framework 4.5

Returns a task that represents a Windows Runtime asynchronous action that can be cancelled.

Namespace:  System
Assembly:  System.Runtime.WindowsRuntime (in System.Runtime.WindowsRuntime.dll)

static Task^ AsTask(
	IAsyncAction^ source, 
	CancellationToken cancellationToken


Type: IAsyncAction

The asynchronous action.

Type: System.Threading::CancellationToken

A token that can be used to request cancellation of the asynchronous action.

Return Value

Type: System.Threading.Tasks::Task
A task that represents the asynchronous action.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IAsyncAction. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).


source is nullptr.

Use this method to get a Task object for a Windows Runtime asynchronous operation. Task objects simplify the coordination of asynchronous operations.

.NET Framework

Supported in: 4.5

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone Silverlight 8

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012

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

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