static void Main(string[] args) { List <Staff> myStaff = new List <Staff>(); FileReader fr = new FileReader(); int month = 0; int year = 0; while (year == 0) { Console.Write("\nPlease enter the year: "); try { year = Convert.ToInt32(Console.ReadLine()); } catch (FormatException) { Console.Write("\nInvalid entry."); } } while (month == 0) { Console.Write("\nPlease enter the month: "); try { month = Convert.ToInt32(Console.ReadLine()); if (month < 1 || month > 12) { Console.Write("\nInvalid value."); month = 0; } } catch (FormatException) { Console.Write("\nInvalid entry."); } } myStaff = fr.ReadFile(); for (int i = 0; i < myStaff.Count; i++) { try { Console.Write("\nEnter hours worked for {0}: ", myStaff[i].NameOfStaff); myStaff[i].HoursWorked = Convert.ToInt32(Console.ReadLine()); myStaff[i].CalculatePay(); Console.WriteLine(myStaff[i].ToString()); } catch (Exception e) { Console.WriteLine(e.Message); i--; } } PaySlip ps = new PaySlip(month, year); ps.GeneratePaySlip(myStaff); ps.GenerateSummary(myStaff); Console.Read(); }