class Undecorated {
        public void Method1() {
            Console.WriteLine("Undecorated");
        }
    }

    class Decorated : Undecorated {
        Undecorated u { get; set; }

        public void Method1() {
            u.Method1();
            Console.WriteLine("Decorated");
        }
    }

    class Program {

        static void Main(string[] args) {
            Undecorated u = new Decorated();
            u.Method1();

            Console.ReadKey();
        }
    }