static void Main(string[] args) { Rectangle r = new Rectangle(10, 7); double a = r.area(); Console.WriteLine("Area: {0}", a); Console.ReadKey(); }
static void Main(string[] args) { Caller c = new Caller(); Rectangle r = new Rectangle(10, 7); Triangle t = new Triangle(10, 5); c.CallArea(r); c.CallArea(t); Console.ReadKey(); }