What do I return from the LinkedInAuthenticationProvider.OnAuthenticated delegate?

Question

OnAuthenticated is a Func<LinkedInAuthenticationContext, Task> and is a member of the LinkedInAuthenticationProvider class. I do not want to return anything from it. I basically just want to subscribe to this delegate to print a few diagnostic details to the debug window.

How do I return a task that means nothing?

Answer 1

How do I return a task that means nothing

Task.FromResult(true);

Or:

Task dummy = new Task(()=> {return;});
dummy.Start();

return dummy;

EDIT:

You can define a static class for that matter:

public static class CompletedTask
{
    private static readonly Task _completed = new Task(()=> {return;});
    static CompletedTask()
    {
        _completed.Start();
    }

    public static Task GetCompletedTask()
    {
        return _completed;
    }       
}

They did the same thing in project Orleans - TaskDone class.