Window service in .net c# with Timer

///////////////// Code

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Diagnostics;

using System.Linq;

using System.ServiceProcess;

using System.Text;

using System.Threading;

using System.Configuration;

namespace SendMailTimer

{

    public partial class SendMails : ServiceBase

    {

        Timer _tmr;

        static bool timerVal = true;

        public SendMails()

        {

            InitializeComponent();

            _tmr = new Timer(new TimerCallback(Tmr_TickEvent), null, Timeout.Infinite, Timeout.Infinite);

            _tmr.Change(0, 60000);// 1min. = 60000 = 60 sec.

        }

        protected override void OnStart(string[] args)

        {

            Common.WriteToFile("Service Started");

        }

        protected override void OnStop()

        {

            _tmr.Dispose();

            Common.WriteToFile("Service Stopped");

        }

        public void Tmr_TickEvent(object state)

        {

            if (timerVal == true)

            {

                timerVal = false;

                try

                {

                 

                    timerVal = true;

                }

                catch (Exception _ex)

                {

                    Common.WriteToFile(DateTime.Now + "::.......................................Error.......................................");

                    timerVal = true;

                }

            }

        }

    }

}

////////////////////////   Steps

1.    Create new project >  windows service
2.    Change service name
3.    Double click on service
4.    Right click on service design >>  Add installer
5.    Right click on ServiceInstaller1 >> property >> Change Description , DisplayName                            and  ServiceName
6.    Right click on serviceProcessInstaller1 >> property >> Account >> Select LocalSystem

Copy above code and past and debug