OnStop() not execute on close of Ctrader

Hi

I create a csv file at the start OnStart(), then at the stop OnStop() the file is deleted. This works fine when the cbot is started or stopped. 

When Cbot is running and the ctrader app is closed OnStop() is not executed, in this case the csv is not deleted. Please refer to the code.

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

using cAlgo.API.Indicators;
using cAlgo.API.Internals;
using cAlgo.Indicators;

namespace cAlgo.Robots
{
    [Robot(TimeZone = TimeZones.UTC, AccessRights = AccessRights.FullAccess)]
    public class OnStopV1 : Robot
    {
        [Parameter(DefaultValue = 0.0)]
        public double Parameter { get; set; }

        string filename;
        protected override void OnStart()
        {
            filename = @"C:\temp\" + Symbol.Name + ".csv";
            File.WriteAllText(filename, Symbol.Name + "," + Symbol.PipValue);

            
        }

        protected override void OnTick()
        {
            // Put your core logic here
        }

        protected override void OnStop()
        {

            if (File.Exists(filename)) File.Delete(filename);
            // Put your deinitialization logic here
        }
    }
}

Please refer to the code.