title: Automatic Invoking for cross-thread actions
body: <p>is there any solution for this scenario:</p>
  
  <p>I do some time-consuming things on a new Thread (using Tasks). In this thread I want to update UI elements (text) so that the user knows what happens. This should happen at real-time, not only when a Task finished.</p>
  
  <p>I always must explicitly call Dispatcher.Invoke() (it's the UI-Thread dispatcher) if I want to change something. Is there a way to run something asynchronously without having to invoke explicitly? I found a solution using the TaskFactory and specifying a TaskScheduler. But this locks the UI when UI-calls are made.</p>
  
  <p>Is there a way to do this, without locking the UI?</p>
  
  <p>EDIT: Because of some slight misunderstandings this edit.
  I want that once I call something like</p>
  
  <pre><code>uiControl.Text = "Test 123";
  </code></pre>
  
  <p>on the worker-thread to be automatically invoked on the UI-Thread if needed. So in this case it's needed, but I want to get rid of all these Invoke-calls. So if there is a nifty solution it would be great. Otherwise I have to use explicit invokes, not nice but ok.</p>