private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
if (COM4.IsOpen)
{
COM4.Close();
}
}
private void button2_Click(object sender, EventArgs e)
{
try
{
if (COM4.IsOpen)
{
COM4.Close();
}
status.Text = "закрыт";
}
catch (System.IO.IOException)
{
status.Text = "ошибка";
MessageBox.Show("НЕТ");
}
}
