之后在重新打開這個線程？

private void display()

{

while (ff == true)

{

}

}

void button1_Click(object sender, EventArgs e)

{

if (button1.Text == "開始監控")

{

ff=true;

Thread a = new Thread(new ThreadStart(display));

a.Start();

button1.Text = "停止監控";

}

else

{

a.Abort();

serialPort1.Close();

button1.Text = "開始監控";

ff = false;

}

}