I have encountered the following interface in a real productive code base: interface ILoadData<In, Out> { Out Get(In input); } So essentially this says th

I have encountered the following interface in a real productive code base: interface ILoadData<In, Out> { Out Get(In input); } So essentially this says that to implement this interface you must have a function that takes in something (you decide!) and outputs something (you decide!) and it's called Get. Totally useless.