private void button2_Click(object sender, RoutedEventArgs e) { dialog.OpenUserGroupDialog openWin = new dialog.OpenUserGroupDialog(); openWin.ShowDialog(); UserModel um = openWin.getSelected(); if (null != um) { t_group.Text = um.Department; t_group.Focus(); tb_group.Text = um.Department; tb_group.Focus(); } openWin.Close(); }