private void btnSua_Click(object sender, RoutedEventArgs e)
 {
     if (Danhsachloai.SelectedItem != null)
     {
         ThemSuaChucVu ts = new ThemSuaChucVu(Danhsachloai.SelectedItem as Chucvu);
         (this.Parent as StackPanel).Children.Add(ts);
     }
 }
 private void btnThem_Click(object sender, RoutedEventArgs e)
 {
     ThemSuaChucVu ts = new ThemSuaChucVu();
     (this.Parent as StackPanel).Children.Add(ts);
 }