static void Main(string[] args)
        {
            var normalDuck = new Duck(new FlyWithWings(), new Quack());
            normalDuck.PerformFly();
            normalDuck.PerformQuack();

            var rubberDuck = new Duck(new FlyNoWay(), new Squeak());
            rubberDuck.PerformFly();
            rubberDuck.PerformQuack();

            Console.ReadKey();
        }