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Interfaces

An interface works like a contract, the classes that implements an interface are guaranteed to implement the methods declared in the interface. This allows for the use of polymorphism in that a function can specify that it wants an object handle to an object that implements a certain interface. The function can then call the methods on this interface without having to know the exact type of the object that it is working with.

      // The interface declaration
      interface MyInterface
      {
        void DoSomething();
      }

      // A class that implements the interface MyInterface
      class MyClass : MyInterface
      {
        void DoSomething()
        {
          // Do something
        }
      }

A class can implement multiple interfaces; Simply list all the interfaces separated by a comma.