public static void Main(String[] args) { SPoint p = new SPoint(11, 22); Console.WriteLine("p = {0}", p); // Now p = (11, 22) p.Move(9, 8); Console.WriteLine("p = {0}", p); // Now p = (20, 30) p.Move(5, 5).Move(6, 6); Console.WriteLine("p = {0}", p); // Now p = (25, 35) not (31, 41) q.Move(5, 5); Console.WriteLine("q = {0}", q); // Now q = (33, 44) not (38, 49) }