Code Commenting: Do you put your code comments on Interfaces or on Concrete classes, or both? [duplicate]

Answer 1

Your example code doesn't use explicit interface implementation. The client of your code is going to need both since s/he can invoke the method either through a class object or interface reference. With explicit interface implementation you can omit the class method comment since the client can never see it. This is assuming you are using XML documentation to generate IntelliSense info.