private void buttonPortSetting_Click(object sender, EventArgs e) { using (ComportSettingDialog csd = new ComportSettingDialog()) { csd.Owner = this; csd.PortDescString = testEnv.descPort; if (csd.ShowDialog() == System.Windows.Forms.DialogResult.OK) { testEnv.descPort = csd.PortDescString; SyncSerialPort(); } } }