Using Event add/remove accessors

Hi all.

In my program, there is a clear seperation between GUI code and application code - this is implemented by the GUI only being able to "see" an interface class (and specifically implementing the Command and Façade design patterns.)

                                /
                        GUI ->  \ -> AppInterface -> HiddenApp Class(es)
                                /

                         [Command]    [Façade]

An object in the GUI (MyGuiObject) needs to receive an event from an object in the app (HiddenAppObject), but I'd like to hide exactly where the event comes from. So I implemented my own add/remove event accessors on the AppInterface that does event registration/deregistration to the HiddenAppClass:

public class AppInterface
{
  public event EventHandler SomeEvent
  {
    add {HiddenAppClass.TheEvent += value);
    remove {HiddenAppClass.TheEvent -= value);
  }
}

so in the GUI, I only know of the AppInterface, but I am able to receive events from the hidden application classes. 

This works, but I am wondering if anyone knows a reason not to do such a thing? I got this idea from http://msdn.microsoft.com/msdnmag/issues/06/11/NETMatters/default.aspx.

thanks,

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