private void CustomerListButton_Click(object sender, EventArgs e) { /* * Contact types passed to ExampleCustomersList1 are existing values in the ContactType table */ var customers = SqlOperations.ExampleCustomersList1(new List <string>() { "Assistant Sales Agent", "Owner" }); if (_hasException) { MessageBox.Show($"Failed with\n{_lastException.Message}"); } else { MessageBox.Show($"Returned {customers.Count} rows"); } }