public static void HistoryTest() { GSM one = new GSM("mod", "manu"); Console.WriteLine(one.CallHistory.Count); Call someCall = new Call("135", 100); Call two = new Call("6541651", 102); one.AddCall(someCall); Console.WriteLine(one.CallHistory.Count); one.AddCall(two); Console.WriteLine(one.CallHistory.Count); Console.WriteLine(one.CalcPriceOfCalls()); Console.WriteLine(one.ToString()); one.RemoveLongestCall(); Console.WriteLine(one.ToString()); }