using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using System;

namespace TestConsoleService
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello World!");
            CreateHostBuilder(args).Build().Run();
        }

        public static IHostBuilder CreateHostBuilder(string[] args) =>
          Host.CreateDefaultBuilder(args)
         .ConfigureServices((hostContext, services) =>
         {
             services.AddHostedService<DataService>();
         });
        //.UseWindowsService();
    }
}

using Microsoft.Extensions.Hosting;
using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace TestConsoleService
{
   public  class DataService : BackgroundService
    {  
       private static  string _logFile =Path.Combine( Directory.GetCurrentDirectory() ,"Log.txt");
       private  static  long i = 0;
        protected override async Task ExecuteAsync(CancellationToken stoppingToken)
        {
            // Do some work
            try
            { 
                Timer timer = new Timer(RunWork,null,1,2000);
                Console.CancelKeyPress += Console_CancelKeyPress;
            }
            catch (Exception ex)
            {
                Log("Error :" + ex.Message);
            }
        }

        private void Console_CancelKeyPress(object sender, ConsoleCancelEventArgs e)
        {
            Console.WriteLine("are you exit?");
            e.Cancel=true;
        }

        private static void RunWork(object o) {
           i++;
           Log(""+DateTime.Now+ "  " + i+"\r\n");
           Console.WriteLine("" + DateTime.Now + "  " + i);

        }

      
        private static  void Log(string s) {
            try
            {
                File.AppendAllText(_logFile, s);
            }
            catch { }
        
        }

    
    }
    
 
}