Automatically reload topshelf service after build

DevHost.cs

using System;
using System.IO;
using System.Threading;
using System.Diagnostics;
using System.Runtime.InteropServices;

class Program
{
    const string exe = "Server.exe";
    const string config = exe + ".config";
    const int QuietPeriod = 1000;

    static int processId;
    static bool shutdown = false;
    static bool reload = false;
    static Timer timer;
    static FileSystemWatcher watcher;

    static int Main (string[] args)
    {
        Console.CancelKeyPress += (sender, evt) => {
            if (evt.SpecialKey == ConsoleSpecialKey.ControlC) {
                // in case ^C is pressed while a defered reload is signaled
                shutdown = true;
            }
        };

        processId = GetProcessId ();
        WatchForChanges ();

        int result = 0;
        do {
            reload = false;
            result = Run (args);
        } while (reload && !shutdown);

        return result;
    }

    static void WatchForChanges ()
    {
        timer = new Timer (Restart);

        watcher = new FileSystemWatcher (Environment.CurrentDirectory);
        watcher.NotifyFilter = NotifyFilters.CreationTime | NotifyFilters.LastWrite | NotifyFilters.Size;
        watcher.Changed += TriggerRestart;
        watcher.Created += TriggerRestart;
        watcher.Deleted += TriggerRestart;
        watcher.Renamed += TriggerRestart;
        watcher.EnableRaisingEvents = true;
    }

    static void TriggerRestart (object sender, EventArgs args)
    {
        timer.Change (QuietPeriod, Timeout.Infinite);
    }

    static void Restart (object state)
    {
        reload = true;
        GenerateConsoleCtrlEvent (ConsoleCtrlEvent.CTRL_C, processId);
    }

    static int Run (string[] args)
    {
        var setup = new AppDomainSetup {
            ShadowCopyFiles = bool.TrueString,
            ApplicationBase = Environment.CurrentDirectory,
            ConfigurationFile = config,
        };

        var domain = AppDomain.CreateDomain ("Service", null, setup);
        var result = domain.ExecuteAssembly (exe, args);
        AppDomain.Unload (domain);

        if (reload) {
            Console.ForegroundColor = ConsoleColor.Yellow;
            Console.BackgroundColor = ConsoleColor.DarkMagenta;
            Console.Write("--- RESTARTING ---");
            Console.ResetColor();
            Console.WriteLine();
        }

        return result;
    }

    static int GetProcessId ()
    {
        using (var process = Process.GetCurrentProcess()) {
            return process.Id;
        }
    }

    [DllImport("kernel32.dll", SetLastError=true)]
    static extern bool GenerateConsoleCtrlEvent(ConsoleCtrlEvent sigevent, int dwProcessGroupId);

    public enum ConsoleCtrlEvent
    {
        CTRL_C = 0,
        CTRL_BREAK = 1,
        CTRL_CLOSE = 2,
        CTRL_LOGOFF = 5,
        CTRL_SHUTDOWN = 6
    }
}