im newbie in C#, want to make a small app that checks the disks and in case of write timeout or exceptions (disk disconnection or something) do the computer restart.
This code seems to be working normally when i run it – it simply writes to some txt file date every one second, but when i offline the disk and online it again it firstly goes correct and then stop working normally.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using System.Threading;
using System.Timers;
using System.Collections;


public class Example
{
    public static int failedCounter = 0;
    public static int errorRestartThreshold = 5;


    const int delayInMilliseconds = 1000;
    const int diskThresholdGb = 20;
    const string writeDirectoryName = "cdiskmonitorCheck";
    const string writeFileName = "cdiskmonitorCheck.txt";

    const string fullErrorDirectoryName = "c:\cdiskmonitorCheck";
    const string fullErrorFileName = fullErrorDirectoryName +"\"+ "cdiskmonitorError.log";



    public bool exceptionFlag = false;

    public static void Main()
    {
        Example e = new Example();
        e.OnStart();

    }
    public void OnStart()
    {

        //Thread t = new Thread(Listener);
        foreach (var drive in DriveInfo.GetDrives())
        {
            if (drive.IsReady == true)
            {
                double totalSpace = drive.TotalSize;
                int totalSpaceinGB = (int)(totalSpace / 1024 / 1024 / 1024);

                if (totalSpaceinGB > diskThresholdGb)
                {
                    string diskName = drive.Name;
                    Console.WriteLine(diskName);
                    if (diskName == "D:\")
                    {
                        Console.WriteLine("we start");
                        Thread t = new Thread(Listener);
                        t.Start(diskName);
                    }

                }
            }

        }
        Console.ReadLine();

    }

    private void Listener(object diskLetter)
    {
        Thread thread = null;

        //diskLetter = "fff:";

        string fullWriteFolderPath = diskLetter +writeDirectoryName;
        string fullWriteFilePath = fullWriteFolderPath + "\" + writeFileName;

        

        while (true)
        {
            var task = Task.Run(() =>
            {
                exceptionFlag = false;
                DateTime start = DateTime.Now;
                thread = Thread.CurrentThread;
                
                try
                {
                    //create directory
                    if (!Directory.Exists(fullWriteFolderPath))
                    {
                        Directory.CreateDirectory(fullWriteFolderPath);
                    }
                    Console.WriteLine(fullWriteFilePath);

                    Console.WriteLine(start.ToString("MM/dd/yyyy hh:mm:ss.fff"));
                    using (StreamWriter sw = new StreamWriter(fullWriteFilePath))
                        {
                            sw.WriteLine(start.ToString("MM/dd/yyyy hh:mm:ss.fff"));
                        }
                    
                    failedCounter = 0;
                }
                catch (Exception ex)
                {
                    exceptionFlag = true;
                    //break;
                    Console.WriteLine(ex.ToString());

                }

                DateTime finish = DateTime.Now;

                System.TimeSpan diff = finish - start;
                int diffInMilliseconds = (int)diff.TotalMilliseconds;

                //we wait for sometime to be 1 second
                if (diffInMilliseconds < delayInMilliseconds)
                {
                    Task.Delay((delayInMilliseconds - diffInMilliseconds)).Wait();
                    //Console.WriteLine((delayInMilliseconds - diffInMilliseconds));
                }

            });


            //Check if task is finished.

            bool isCompletedSuccessfully = task.Wait(TimeSpan.FromMilliseconds(1200));
            //Console.WriteLine(isCompletedSuccessfully);
            DateTime current = DateTime.Now;
            if (!Directory.Exists(fullErrorDirectoryName))
            {
                Directory.CreateDirectory(fullErrorDirectoryName);
            }

            if (exceptionFlag)
            {
                current = DateTime.Now;
                thread.Abort(true);
                failedCounter++;
                Console.WriteLine("Exception writting to file");
                using (StreamWriter sw = File.AppendText(fullErrorFileName))
                {
                    sw.WriteLine(current.ToString("MM/dd/yyyy hh:mm:ss.fff") + " exception, counter:" + failedCounter.ToString());
                }
            }
            else
            {
                if (!isCompletedSuccessfully)
                {

                    current = DateTime.Now;
                    failedCounter++;
                    Console.WriteLine("Timeoutted writting to file");
                    thread.Abort(true);

                    using (StreamWriter sw = File.AppendText(fullErrorFileName))
                    {
                        sw.WriteLine(current.ToString("MM/dd/yyyy hh:mm:ss.fff") + " timeoutted, counter:" + failedCounter.ToString());
                    }

                }
                else
                {
                    failedCounter = 0;
                    Console.WriteLine("Task completed during period");
                }

            }

            Console.WriteLine(failedCounter);



            if (failedCounter >= errorRestartThreshold)
            {
                current = DateTime.Now;
                using (StreamWriter sw = File.AppendText(fullErrorFileName))
                {
                    sw.WriteLine(current.ToString("MM/dd/yyyy hh:mm:ss.fff") + " we restart server., counter:" + failedCounter.ToString());
                }
            }
            

        }

    }

}

working example

For example when i disconnect the disk D and then in few moments connect it back it still cant write to it and generates wrong result

i seaching for the answer for 2 weeks already, can anyone knows what need to be corrected? Thank you so much!