title: MVVM - Invoke Control Method
body: <p>I am looking for a MVVM solution.
  A Control is used in the View (lets call it V). The Control has a Method Foo(). That method can not be invoked by an event since its operation is not connected to any events of the control.
  I need to invoke this method from the ViewModel, but of course the ViewModel has no knowledge about the view. Do you have any ideas how to extend the Control to enable a MVVM compliant invocation of V.Foo()?</p>