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TaskFactory.FromAsync Method (IAsyncResult, Action<IAsyncResult>)

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

Creates a Task that executes an end method action when a specified IAsyncResult completes.

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

public Task FromAsync(
	IAsyncResult asyncResult,
	Action<IAsyncResult> endMethod


Type: System.IAsyncResult
The IAsyncResult whose completion should trigger the processing of the endMethod.
Type: System.Action<IAsyncResult>
The action delegate that processes the completed asyncResult.

Return Value

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


The exception that is thrown when the asyncResult argument is null.


The exception that is thrown when the endMethod argument is null.

Windows Phone OS

Supported in: 8.1, 8.0