private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
DialogResult result = MessageBox.Show("是否退出串口工具", "提示", MessageBoxButtons.YesNo);
if (result == DialogResult.Yes)
{
e.Cancel = false;
portControl.closePort();
this.Dispose();
this.Close();
}
else
{
e.Cancel = true;
}
}