public static int AddCustomer(LTS.Customer customer)
        {
            int?CustomerID = -1;

            try
            {
                using (LTS.LTSBase access = new LTS.LTSDC())
                {
                    access.InsertCustomer(customer.CellNo, customer.CustAddress, customer.Email, customer.IDno, customer.Name, customer.Surname, ref CustomerID);
                }
            }
            catch (Exception ex)
            {
            }
            return(CustomerID.Value);
        }