public List <Customer> ShowCustomers(string accountNo) { if (accountNo.IsNullOrWhiteSpace()) { return(gateway.GetCustomers()); } else { return(gateway.GetSpecificCustomer(accountNo)); } }
public List <Customer> ShowCustomers(string accountNo) { if (accountNo.IsNullOrWhiteSpace()) { return(gateway.GetCustomers()); } else { return(gateway.GetSpecificCustomer(accountNo)); } }