Нужна помощь в понимании как реализовать сбор данных и их обработку

TimeSpan[] all_day = new TimeSpan[250];
TimeSpan[] all_day_sub = new TimeSpan[250];
void run_time()
{
    //6752 hours   6751 milisec
    
    ret = FanucOpe.cnc_rdparam(FanucOpe.h, 6751, 0, 8 + 4, param6751);
    ret1 = FanucOpe.cnc_rdparam(FanucOpe.h, 6752, 0, 8, param6752);
    if (ret == FanucOpe.EW_OK && ret1 == FanucOpe.EW_OK)
    {
        textBox2.Text = convert_param_to_TimeSpan(param6751.ldata, param6752.ldata).ToString();
        textBox1.Text = convert_TimeSpan_to_Hours(convert_param_to_TimeSpan(param6751.ldata, param6752.ldata));
    }
    void writeToList(TimeSpan[] all_day)
    {
        listBox1.Items.Clear();
        for (int i = 0; i <= 23; i++)
        {
            all_day_sub[i] = this.all_day[i].Subtract(this.all_day[i + 1]);
            listBox1.Items.Add(this.all_day_sub[i]);
        }
    }
 
 
    TimeSpan convert_param_to_TimeSpan(int _param6751, int _param6752)  //
    {
        //hh:mm:ss
        var mils = TimeSpan.FromMinutes(_param6752).TotalMilliseconds;  //из минут в лиллисикунды
        var out_milisec = mils + _param6751;   //сложение двух полей милисикундных
        var timeSpan = TimeSpan.FromMilliseconds(out_milisec);
        int dd = timeSpan.Days;
        int hh = (int)timeSpan.TotalHours;
        int mm = timeSpan.Minutes;
        int ss = timeSpan.Seconds;
        // TimeSpan ts = timeSpan.Subtract();
        var currenttime = DateTime.Now;
 
        // if (currenttime.Minute == 0 && currenttime.Second <= 1)
        if (currenttime.Second == 0 || currenttime.Second == 5 || currenttime.Second == 10 || currenttime.Second == 15 ||
            currenttime.Second == 20 || currenttime.Second == 25 || currenttime.Second == 30 || currenttime.Second == 35 ||
            currenttime.Second == 40 || currenttime.Second == 45 || currenttime.Second == 50 || currenttime.Second == 55)
        {
            all_day[currenttime.Second] = timeSpan;
            writeToList(all_day);
        }
 
        return timeSpan;
    }
    string convert_TimeSpan_to_Hours(TimeSpan ts)  // timespan to hours
    {
        int dd = ts.Days;
        int hh = (int)ts.TotalHours;
        int mm = ts.Minutes;
        int ss = ts.Seconds;
        return string.Format("H{0}:M{1}:S{2} -ts:{3}", hh, mm, ss, ts); ;
    }
 
}

struct TimeDataFromMCU
{
    int Minute { get; }
    int Millisec { get; }
 
    public TimeDataFromMCU(int min, int msec)
    {
        Minute = min;
        Millisec = msec;
    }
 
    public readonly int GetTotalSeconds() => Minute * 60 + Millisec / 1000;
 
    public readonly int GetDiffSecondFromAnother(TimeDataFromMCU other) =>
        Math.Abs(this.GetTotalSeconds() - other.GetTotalSeconds());
 
    public static (int day, int hrs, int min, int sec) GetSpanToDdHhMmSs(int totalsec)
    {
        TimeSpan tspan = TimeSpan.FromSeconds(totalsec);
        return (tspan.Days, tspan.Hours, tspan.Minutes, tspan.Seconds);
    }
}

// Получили времена от контроллера...
TimeDataFromMCU td1 = new TimeDataFromMCU(61, 37488);
TimeDataFromMCU td2 = new TimeDataFromMCU(99, 40555);
Console.WriteLine(TimeDataFromMCU.GetSpanToDdHhMmSs(td1.GetDiffSecondFromAnother(td2)));
Console.Read();

class CNCWorkTimePeriod
{
  public CNCWorkTime StartTime {get;set;}
  public CNCWorkTime EndTime {get;set;}
  public TimeSpan WorkTime {get;}
  public int Details {get;set;}
}

      if (prevWorkTime != null)
      {
        CNCWorkTimePeriod newPeriod = new CNCWorkTimePeriod(prevWorkTime, currentWorkTime, 100);
        periods.Add(newPeriod);
      }
      prevWorkTime = currentWorkTime;

 if (prevWorkTime == null)
 {
   prevWorkTime = currentWorkTime;
 }
 else
 {
   CNCWorkTimePeriod newPeriod = new CNCWorkTimePeriod(prevWorkTime, currentWorkTime, 100);
   periods.Add(newPeriod);