gistfile1.cs

using System;
using System.Collections.Generic;
using System.Timers;
using Topshelf;

namespace ConsoleApplication
{
    public interface IProcess
    {
        void ProcessHandler(object o, ElapsedEventArgs args);
    }

    public class Process1 : IProcess
    {
        public void ProcessHandler(object o, ElapsedEventArgs args)
        {
            Console.WriteLine("Process1");
        }
    }

    public class Process2 : IProcess
    {
        public void ProcessHandler(object o, ElapsedEventArgs args)
        {
            Console.WriteLine("Process2");
        }
    }

    public class ProcessRunner
    {
        public ProcessRunner(IEnumerable<IProcess> processes)
        {
            _timer = new Timer(100);
            foreach (var process in processes)
            {
                _timer.Elapsed += process.ProcessHandler;
            }
        }

        public void Start()
        {
            _timer.Start();
        }

        public void Stop()
        {
            _timer.Stop();
        }

        private readonly Timer _timer;
    }

    class Program
    {
        static void Main(string[] args)
        {
            HostFactory.Run(x =>
            {
                x.Service<ProcessRunner>(s =>
                {
                    s.ConstructUsing(name => new ProcessRunner(
                        new List<IProcess>
                        {
                            new Process1(),
                            new Process2()
                        }));
                    s.WhenStarted(_ => _.Start());
                    s.WhenStopped(_ => _.Stop());
                });
                x.RunAsLocalSystem();
                // other settings here...
            });
        }
    }
}