1、 Invoke(new Action(() =>
Invoke(new Action(() =>
{
if(V.Contains("E"))
MessageBox.Show(" Error,try again!");
else
textBox2.Text += "Current voltage is " + V + "V" + "\r\n";
}));
里面的Invoke(new Action(() 尤其是=>
原文：https://www.cnblogs.com/xihong2014/p/14814216.html