Encog.App.Quant.Loader.Yahoo.YahooDownload.LoadAllData C# (CSharp) Method

        public void LoadAllData(String ticker, String output, CSVFormat outputFormat, DateTime from,
                                DateTime to)
        {
            try
            {
                Uri urlData = BuildURL(ticker, from, to);
                WebRequest httpData = WebRequest.Create(urlData);
                var responseData = (HttpWebResponse) httpData.GetResponse();

                Stream istreamData = responseData.GetResponseStream();
                var csvData = new ReadCSV(istreamData, true, CSVFormat.English);

                TextWriter tw = new StreamWriter(output);
                tw.WriteLine("date,time,open price,high price,low price,close price,volume,adjusted price");

                while (csvData.Next())
                {
                    DateTime date = csvData.GetDate("date");
                    double adjustedClose = csvData.GetDouble("adj close");
                    double open = csvData.GetDouble("open");
                    double close = csvData.GetDouble("close");
                    double high = csvData.GetDouble("high");
                    double low = csvData.GetDouble("low");
                    var volume = (long) csvData.GetDouble("volume");

                    var line = new StringBuilder();
                    line.Append(NumericDateUtil.DateTime2Long(date));
                    line.Append(outputFormat.Separator);
                    line.Append(NumericDateUtil.Time2Int(date));
                    line.Append(outputFormat.Separator);
                    line.Append(outputFormat.Format(open, Precision));
                    line.Append(outputFormat.Separator);
                    line.Append(outputFormat.Format(high, Precision));
                    line.Append(outputFormat.Separator);
                    line.Append(outputFormat.Format(low, Precision));
                    line.Append(outputFormat.Separator);
                    line.Append(outputFormat.Format(close, Precision));
                    line.Append(outputFormat.Separator);
                    line.Append(volume);
                    line.Append(outputFormat.Separator);
                    line.Append(outputFormat.Format(adjustedClose, Precision));
                    tw.WriteLine(line.ToString());
                }

                tw.Close();
            }
            catch (WebException ex)
            {
                throw new QuantError(ex);
            }
        }        
    }

        public void TestYahooDownloadError()
        {
            try
            {
                var yahoo = new YahooDownload();
                yahoo.Precision = 2;
                // load a non-sense ticker, should throw error
                yahoo.LoadAllData("sdfhusdhfuish", OutputName.ToString(), CSVFormat.English,
                                  new DateTime(2000, 01, 01),
                                  new DateTime(2000, 01, 10));

                // bad!
                Assert.IsTrue(false);
            }
            catch (QuantError)
            {
                // good!
            }
        }