private void MenuItem_Click(object sender, RoutedEventArgs e)
{
themPKB pkb = new themPKB();
pkb.mabenhnhan.Text = bn.MaBN.ToString();
pkb.hoten.Content = bn.TenBN;
pkb.Show();
}
private void DockPanel_MouseLeftButtonUp_3(object sender, MouseButtonEventArgs e)
{
themPKB pkb = new themPKB();
pkb.Show();
}
