public static bool TestGetSimpleRate(MySqlConnection conn)
        {
            DataSet   MyDataSet   = ExcelDataReader.LoadFile("C:/Research/data/test_data/stir_option_rate_test.xlsx");
            DataTable MyDataTable = MyDataSet.Tables["All"];

            MyDataTable.Columns.Add("int_rate2", typeof(Double));
            MyDataTable.Columns.Add("rate_diff", typeof(Double));

            foreach (DataRow row in MyDataTable.Rows)
            {
                string   ExpDate        = row.Field <double>("exp_date").ToString();
                string   Settledate     = row.Field <double>("settle_date").ToString();
                DateTime ExpDatetime    = DateTime.ParseExact(ExpDate, "yyyyMMdd", CultureInfo.InvariantCulture);
                DateTime SettleDatetime = DateTime.ParseExact(Settledate, "yyyyMMdd", CultureInfo.InvariantCulture);
                row["int_rate2"] = RateFromStir.GetSimpleRate(SettleDatetime, SettleDatetime, ExpDatetime, "ED", conn);
                row["rate_diff"] = row.Field <double>("int_rate") - row.Field <double>("int_rate2");
            }

            int NumLargeDiff = MyDataTable.Select("rate_diff>0.0000000001 AND rate_diff<-0.0000000001").Length;

            if (NumLargeDiff == 0)
            {
                return(true);
            }
            else
            {
                return(false);
            }
        }