private void btnAddNewCustomer_Click(object sender, EventArgs e) { ResetMessages(); try { string name = txtName.Text; int flightId = int.Parse(cbFlightId.Text); Customer customer = new Customer(name, flightId); customerController.RegisterCustomer(customer); UpdateCustomerGrid(); lblMessageCustomer.Text = "New Customer Added"; }catch (Exception ex) { lblMessageCustomer.Text = ex.Message; } }