public void Run()
        {
            Console.WriteLine("Program to an interface, not an implementation");

            RubberDuck      rubberDuck      = new RubberDuck();
            IFlyBehaviour   flyWithRocket   = new FlyWithRocket();
            IQuackBehaviour quackWithSqueek = new QuackWithSqueek();

            rubberDuck.setFlyBehaivour(flyWithRocket);
            rubberDuck.setQuackBehaivour(quackWithSqueek);
            rubberDuck.performFly();
            rubberDuck.performQuack();
        }