private void button6_Click(object sender, EventArgs e) { if (this.InvokeRequired) { dbutton6_Click d = new dbutton6_Click(button6_Click); object[] args = { sender, e }; this.Invoke(d, args); } else { if (AcceptedEmulator != null) { if (AcceptedEmulator.IsConnected) { if (!filetb.Text.Equals("") && !linetb.Text.Equals("")) { AcceptedEmulator.Send("EXIT\n"); } } } } }