public List<RateData> GetCurrencyInfo(string currency)
 {
     List<RateData> result = new List<RateData>();
     foreach(RateData data in currencyInfo)
     {
         if(data.Symbol.Substring(1,3) == currency)
         {
             RateData newItem = new RateData();
             newItem = data;
             result.Add(newItem);
         }
     }
     return result;
 }
        private static List<RateData> Parse(string csvData)
        {
            List<RateData> RateInfo = new List<RateData>();

            string[] rows = csvData.Replace("\r", "").Split('\n');

            foreach (string row in rows)
            {
                if (string.IsNullOrEmpty(row)) continue;

                string[] cols = row.Split(',');

                RateData tempRateData = new RateData();
                tempRateData.Symbol = cols[0];//.Replace('"','');
                tempRateData.Rate = Convert.ToDouble(cols[1].Replace('.', ','));
                tempRateData.Range = cols[2];
                tempRateData.Date = cols[3];

                RateInfo.Add(tempRateData);
            }

            return RateInfo;
        }