Peace be Upon You,
While i was playing with visual studio class diagram designer, i found out that if you had several classes which are implementing an interface or inheriting from a parent class, if you changed in the parent class or the interface the changes are reflected in all the child classes.
I found this a really great feature which saves a lot of effort in case of updates to parent classes or interfaces, also with abilities to totally control all the classes using that diagram which gives you a wider view for your classes for better architectural design.
Enjoy playing with it ! 🙂