private void msg(string message) { string text = message; ChatroomMainTextbox.Invoke(new Action(() => ChatroomMainTextbox.Text += text)); ChatroomMainTextbox.Invoke(new Action(() => ChatroomMainTextbox.SelectionStart = ChatroomMainTextbox.TextLength)); ChatroomMainTextbox.Invoke(new Action(() => ChatroomMainTextbox.ScrollToCaret())); }