private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
 {
     if (e.RowIndex >= 0 && e.ColumnIndex == 5)
     {
         OrderDetails ods = (OrderDetails)listBindingSource.Current;
         OrderService os  = new OrderService();
         os.DeleteDetail(ods.ID);
         or.numOfDetails--;
         dataGridView2.Refresh();
         listBindingSource.RemoveAt(e.RowIndex);
         dataGridView2.Refresh();
         os.Update(or);
     }
 }