How to cancel a Task in await?

Question

I\'m playing with these Windows 8 WinRT tasks, and I\'m trying to cancel a task using the method below, and it works to some point. The CancelNotification method DOES get ca

Answer 1

Or, in order to avoid modifying slowFunc (say you don't have access to the source code for instance):

var source = new CancellationTokenSource(); //original code
source.Token.Register(CancelNotification); //original code
source.CancelAfter(TimeSpan.FromSeconds(1)); //original code
var completionSource = new TaskCompletionSource