private static Payslip CreatePayslipManually()
        {
            var employee  = UserInput.CreateEmployeeManually();
            var payPeriod = UserInput.GetPayPeriodManually();

            return(PayslipFactory.MakePayslip(employee, payPeriod));
        }
        private List <Payslip> CreatePayslipFromCsv()
        {
            var filename = UserInput.GetCsvFilename();

            return(PayslipFactory.MakePayslip(filename));
        }