private void tambah_Click(object sender, EventArgs e) { ctrl.CheckData(textBox1.Text.ToString(), textBox2.Text.ToString()); if (ctrl._flag == true) { ctrl.setNomor1(textBox1.Text.ToString()); ctrl.setNomor2(textBox2.Text.ToString()); textBox3.Text = ctrl.getValueOperateTambah().ToString(); } else { MessageBox.Show("Harap Lengkapi Data !"); } }