private void button_Click(object sender, RoutedEventArgs e) {
string s = textblock.Text + " " + textbox.Text;
Clipboard.SetText( s );
}
(I'd pick better "names" for my controls).
It was only in wine that he laid down no limit for himself, but he did not allow himself to be confused by it. ― Confucian Analects: Rules of Confucius about his food