public class MyClass
    {
        readonly Timer _timer;

        private static readonly string FileName = Directory.GetCurrentDirectory ( ) + @"\" + "test.txt";

        public MyClass ( )
        {
            _timer = new Timer ( 5000 )
            {
                AutoReset = true ,
                Enabled = true
            };

            _timer.Elapsed += delegate ( object sender , ElapsedEventArgs e )
            {
                this.witre ( string.Format ( "Run DateTime {0}" , DateTime.Now ) );
            };
        }

        void witre ( string context )
        {
            StreamWriter sw = File.AppendText ( FileName );
            sw.WriteLine ( context );
            sw.Flush ( );
            sw.Close ( );
        }

        public void Start ( )
        {
            this.witre ( string.Format ( "Start DateTime {0}" , DateTime.Now ) );
        }

        public void Stop ( )
        {
            this.witre ( string.Format ( "Stop DateTime {0}" , DateTime.Now ) + Environment.NewLine );
        }

    }

    class Program
    {
        static void Main ( string [ ] args )
        {
            HostFactory.Run ( x =>
            {
                x.Service ( ( s ) =>
                {
                    s.SetServiceName ( "ser" );
                    s.ConstructUsing ( name => new MyClass ( ) );
                    s.WhenStarted ( ( t ) => t.Start ( ) );
                    s.WhenStopped ( ( t ) => t.Stop ( ) );
                } );

                x.RunAsLocalSystem ( );

                //服务的描述
                x.SetDescription ( "Topshelf_Description" );
                //服务的显示名称
                x.SetDisplayName ( "Topshelf_DisplayName" );
                //服务名称
                x.SetServiceName ( "Topshelf_ServiceName" );

            } );
        }
    }