Can I force subclasses to override a method without making it abstract?

Question

I have a class with some abstract methods, but I want to be able to edit a subclass of that class in the designer. However, the designer can\'t edit the subclass unless it

Answer 1

To use ms as an example...

Microsoft does this with the user control templates in silverlight. #if is perfectly acceptable and it is doubtful the the tooling will work around it anytime soon. IMHO