private static void PrintTable(DataTable dt) {
        DataTableReader dtReader = dt.CreateDataReader();
        while (dtReader.Read()) {
            for (int i = 0; i < dtReader.FieldCount; i++) {
                Console.Write("{0} = {1} ",
                    dtReader.GetName(i).Trim(),
                    dtReader.GetValue(i).ToString().Trim());
            }
            Console.WriteLine();
        }
        dtReader.Close();
    }