Task.ContinueWith and TaskContinuationOptions.AttachedToParent

I am trying to use Task.ContinueWithc TaskContinuationOptions.AttachedToParentto perform a continuation task, for example.

Task outerTask = new Task(() => Console.WriteLine("Outer"));
Task innerTask = outerTask.ContinueWith(t =>
    {
        Thread.Sleep(500);
        Console.WriteLine("Inner");
    }, 
    TaskContinuationOptions.AttachedToParent | TaskContinuationOptions.OnlyOnRanToCompletion);
outerTask.Start();
outerTask.Wait();
Console.WriteLine("Outer done");

Exit from this code

Outer
Outer done
Inner

but what I expected / trying to achieve

Outer
Inner
Outer done

Can it be used AttachedToParentto block external completion of a task or is it AttachedToParenteffective only for nested tasks?

Edit:

What I'm trying to achieve is that I want to start the continue task when it is outerTasksuccessfully completed. I want to outerTaskthrow exceptions from the innerTaskcaller without having to deal with innerTask. If it outerTaskfails, it should just throw an exception right away (on outerTask.Wait()no call innerTask).