Bot to export historical data

Hi guys I want to share with you a bot I made that provide a simple way to export backtesting historical data from the ctrader platform to a .csv file

# Instructions

1. Add a new instance of the bot and on the symbol and the timeframe that you wish to export

2. Set in the bot's parameters the directory where will be created the .csv file (the directory needs to exist)

3. (optional) set the buffer size to optimize performance

4. run the backtesting for the time period you wish to export the data

5. A file will be created in the directory specified in the bot's parameters

# Notes

The format of the csv file will be

yyyy.mm.dd | HH:MM | Open | High | Low | Close | TickVolume

# Code

using System;
using System.Linq;
using System.IO;
using cAlgo.API;
using cAlgo.API.Indicators;
using cAlgo.API.Internals;
using cAlgo.Indicators;

namespace cAlgo.Robots
{
    [Robot(TimeZone = TimeZones.UTC, AccessRights = AccessRights.FileSystem)]
    public class ExportHistData : Robot
    {

        [Parameter("Data directory", DefaultValue = "C:\\Data\\Ctrader_hist_data")]
        public string DataDir { get; set; }

        [Parameter("Buffer size", DefaultValue = 10000)]
        public int BufferSize { get; set; }

        private string Path { get; set; }
        private string Buffer { get; set; }
        private int BufferLen { get; set; }

        protected override void OnStart()
        {
            Path = DataDir + "\\" + Symbol.Name + "-" + Bars.TimeFrame.ToString() + ".csv";
            File.CreateText(Path);
            Buffer = "";
            BufferLen = 0;
        }

        protected override void OnBar()
        {
            if (BufferLen < BufferSize)
            {
                Buffer += Bars.OpenTimes.Last(1).ToString("yyyy.MM.dd") + ","
                        + Bars.OpenTimes.Last(1).ToString("HH:mm") + ","
                        + Bars.OpenPrices.Last(1).ToString() + ","
                        + Bars.HighPrices.Last(1).ToString() + ","
                        + Bars.LowPrices.Last(1).ToString() + ","
                        + Bars.ClosePrices.Last(1).ToString() + ","
                        + Bars.TickVolumes.Last(1).ToString() + "\n";
                BufferLen += 1;
            }
            else
            {
                using (StreamWriter sw = File.AppendText(Path))
                {
                    sw.Write(Buffer);
                }
                Buffer = "";
                BufferLen = 0;
            }
        }

        protected override void OnStop()
        {
            if (BufferLen > 0)
            {
                using (StreamWriter sw = File.AppendText(Path))
                {
                    sw.Write(Buffer);
                }
            }
        }
    }
}