private void button_delete_Click(object sender, EventArgs e)
 {
     if (MessageBox.Show("Do you really want to delete Product company ?", "Delete", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
     {
         order.Delete_ORDER_mang(Convert.ToInt32(this.DGV_SALE_MANGER.CurrentRow.Cells[0].Value));
         MessageBox.Show("Deleted successfully", "Delete", MessageBoxButtons.OK, MessageBoxIcon.Information);
         this.DGV_SALE_MANGER.DataSource = order.GET_Order();
     }
     else
     {
         MessageBox.Show("Deletion canceled", "Deletion process", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
     }
 }