...
this.serviceProcessInstaller1.Account = System.ServiceProcess.ServiceAccount.LocalSystem; // my line 1
...
this.serviceInstaller1.Description = "My First Service demo"; // my line 2
...
this.serviceInstaller1.DisplayName = "MyFirstService.Demo"; // my line 3
...

using System;
using System.IO;
using System.ServiceProcess;
using System.Timers;

namespace WindowsService1
{
     public partial class Service1 : ServiceBase
     {
          private Timer _timer = new Timer();

          public Service1()
          {
               InitializeComponent();
          }
         
          protected override void OnStart(string[] args)
          {
               WriteToFile("Service is started at " + DateTime.Now);
              
               _timer.Elapsed += new ElapsedEventHandler(OnElapsedTime);
               _timer.Interval = 5000; //5 seconds
               _timer.Enabled = true;
          }

          protected override void OnStop()
          {
               WriteToFile("Service is stopped at " + DateTime.Now);
          }

          private void OnElapsedTime(object source, ElapsedEventArgs e)
          {
               WriteToFile("Service is recall at " + DateTime.Now);
          }

          public void WriteToFile(string Message)
          {
               string filepath = "D:\\my_service.txt";

               // will write text in end of file
               using (StreamWriter fileStream = File.Exists(filepath) ? File.AppendText(filepath): File.CreateText(filepath))
               {
                    fileStream.WriteLine(Message);
               }
          }
     }
}

C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe D:\WindowsService1\bin\Debug\WindowsService1.exe

net start MyFirstService.Demo

net stop MyFirstService.Demo

C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe /u D:\WindowsService1\bin\Debug\WindowsService1.exe