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This is a question I got asked in an interview.
When you create a WCF service, you get two files; “IService.cs” and “Service.cs”. Why is it a class implementing an interface versus a class inheriting an abstract class. Don’t reply saying that you cannot put a [servicecontract] attribute over the abstract class. I know you can only apply it to interfaces, but why?
One can implement more than one interface. One can only inherit a single abstract class.