static void Main(string[] args) { MobileDevice Nokia = new MobileDevice("Nokia", "Lumia 650", 99, "Mtel", new Display(30, 10000), new Battery()); //MobileDevice Samsung = new MobileDevice("Samsung", "S600", 199, "Globul", // new Display(10, 10000), new Battery("Samsung LongLiveBattery", 20, 5)); Console.WriteLine(Nokia); //Console.WriteLine(Samsung); Nokia.AddCall("0876253132", 120); Nokia.AddCall("0876253452", 22); Nokia.AddCall("0876245555", 42); Nokia.AddCall("0876356565", 52); Nokia.RemoveCall(1); Nokia.CallHistory(); Nokia.AllCallsPrice(); Console.WriteLine("Total Call Price: {0}", Nokia.AllCallsPrice()); }