private void btn_Add_Click(object sender, EventArgs e) { var client = new Client() { firstName = tb_FN.Text, lastName = tb_LN.Text, DOB = dtp_DOB.Value, address = tb_Address.Text, email = tb_Email.Text, phone = tb_Phone.Text }; var status = restService.CreateClientAsync(client).Result; if (status) { MessageBox.Show("Success!"); } else { MessageBox.Show("Failure"); } }