C# programming interfaces

I've always believed that interfaces in C# were simply a waste of code. Coding a simple reference skeleton can't possibly help anything. This is true for smaller projects, but when you start writing larger projects, interfaces are a lifesaver. Interfaces provide the static point in a dynamic program. You will end up coding around them, but you will not break anything by adding to your impementations, or refactoring. There is a really good article for beginners over at c-sharpcorner.com