static void Main(string[] args) { Thread.CurrentThread.CurrentCulture = CultureInfo.InvariantCulture; GSM NokiaGSM = new GSM("Nokia", "NK", 180, "Gogo", new Battery("825L", 123, 100, BatteryType.LiIon), new Display(15, 1024)); NokiaGSM.AddCall(new Call(DateTime.Now, "088888888", 156)); NokiaGSM.AddCall(new Call(DateTime.Now.AddDays(3), "0888888899", 12)); NokiaGSM.AddCall(new Call(DateTime.Now.AddHours(1), "0888888344", 100)); NokiaGSM.AddCall(new Call(DateTime.Now.AddHours(56), "088883443", 1500)); decimal maxDuration = NokiaGSM.CallHistory[0].DurationInSeconds; int positionMaxDurationCall = 0; for (int i = 0; i < NokiaGSM.CallHistory.Count; i++) { Console.WriteLine("{0} call {1}",i+1, NokiaGSM.CallHistory[i]); Console.WriteLine(); if (NokiaGSM.CallHistory[i].DurationInSeconds>maxDuration) { maxDuration = NokiaGSM.CallHistory[i].DurationInSeconds; positionMaxDurationCall = i; } } Console.WriteLine(new string('-', 50)); Console.Write("The total price of your {0} calls is: ", NokiaGSM.CallHistory.Count); Console.WriteLine(NokiaGSM.CalculatePriceAllCalls(NokiaGSM.CallHistory, 0.37m)); NokiaGSM.RemoveCall(NokiaGSM.CallHistory[positionMaxDurationCall]); Console.Write("The total price of your {0} calls without the longest one is: ", NokiaGSM.CallHistory.Count); Console.WriteLine(NokiaGSM.CalculatePriceAllCalls(NokiaGSM.CallHistory, 0.37m)); NokiaGSM.ClearHistory(NokiaGSM.CallHistory); Console.Write("After clearing the history, there are {0} calls.", NokiaGSM.CallHistory.Count); Console.WriteLine(); }