WPF XAML Intellisense doesn’t work correctly for custom routed event handlers

I defined a custom routed event with the following constructs (names changed):

public class MyRoutedEventArgs : RoutedEventArgs
{…}

public delegate void MyRoutedEventHandler(Object sender, MyRoutedEventArgs args);

public static readonly RoutedEvent MyEvent;

MyClass.MyEvent =
EventManager.RegisterRoutedEvent("MyEvent", RoutingStrategy.Tunnel, typeof(MyRoutedEventHandler), typeof(MyClass));

Next, I'm creating a CLR event wrapper:

public event MyRoutedEventHandler MyEvent {
add { AddHandler(MyEvent, value); }
remove { RemoveHandler(MyEvent, value); }
}

The problem is when I define it as shown above, XAML intellisense doesn't work for autogenerating the handler method body. What I noticed is that if you change your CLR event wrapper to use generic RoutedEventHandler type, everything works! However in this case, the auto-generated method gets a generic RoutedEventArgs (well, correctly corresponding to RoutedEventHandler), which forces me to manually rewrite it as MyRoutedEventArgs.