Adding order to Datatable in Ado.net

    private void AddOrder(ref DataTable dtb)
    {
        DataColumn dc = new DataColumn();
        dtb.Columns.Add("Order");
        for (int i = 1; i <= dtb.Rows.Count; i++)
        {
            dtb.Rows[i - 1]["Order"] = i;
        }
    }