How to convert a new windows console application into a windows service ?

using System;
using System.Collections.Generic;
using System.Text;
using System.Net;

namespace SpeedTest
{
   
    class Program
    {
        
        static void Main(string[] args)
        {
            Console.Title = "A simple speedtest app";

            // the URL to download a file from
            Uri URL = new Uri("http://tv.vnn.vn");
            WebClient wc = new WebClient();

            Console.WriteLine("Welcome to this simple speedtest,\nwhich will test your download rate.");
            Console.WriteLine("Press any key to begin.");
            Console.ReadKey();

            Console.WriteLine("\nDownloading file: 1024kb.txt...");
            Console.WriteLine("From http://tv.vnn.vn");
            Console.WriteLine("Note: This file will automatically be deleted after the test.");
            
            // get current tickcount 
            double starttime = Environment.TickCount;

            // download file from the specified URL, and save it to C:\speedtest.txt
            
            wc.DownloadFile(URL, @"C:\SpeedTest\SpeedTest\speedtest.txt");

            // get current tickcount
            double endtime = Environment.TickCount;

            // how many seconds did it take?
            // we are calculating this by subtracting starttime from endtime
            // and dividing by 1000 (since the tickcount is in miliseconds.. 1000 ms = 1 sec)
            double secs = Math.Floor(endtime - starttime) / 1000;

            // round the number of secs and remove the decimal point
            double secs2 = Math.Round(secs, 0);

            // calculate download rate in kb per sec.
            // this is done by dividing 1024 by the number of seconds it
            // took to download the file (1024 bytes = 1 kilobyte)
            double kbsec = Math.Round(1024 / secs);

            Console.WriteLine("\nCompleted. Statistics:\n");

            Console.WriteLine("1mb download: \t{0} secs ({1} secs)", secs2, secs);
            Console.WriteLine("Download rate: \t{0} kb/sec", kbsec);

            Console.WriteLine("\nPress any key to exit...");
            Console.Read();
            Console.WriteLine("Cleaning up... (deleting downloaded file)");
            try
            {
                // delete downloaded file
                System.IO.File.Delete(@"C:\SpeedTest\SpeedTest\speedtest.txt");
                Console.WriteLine("Done.");
            }
            catch
            {
                Console.WriteLine("Couldn't delete download file.");
                Console.WriteLine("To delete the file yourself, go to your C-drive and look for the file 'speedtest.txt'.");
                Console.ReadKey();
            } 
        }

    }
}