I have an interface that is implemented by 100 classes, if I add a method to the interface will my classes compile? How can I fix any errors?

Byron Tymvios

All the implementing classes will not compile. An interface is a contractual obligation. By implementing that interface you are guaranteeing that your class will fulfill its contractual obligation. If you add a new method to an interface then, by definition, all classes implementing that interface will have to implement the new method.