Example

internal static class Program
{
    private static void Main()
    {
        // runs the app as a console application if the command argument "-console" is used
        if (WindowsServiceHelper.RunAsConsoleIfRequested<Service1>())
            return;

        // uses "-install" and "-uninstall" to manage the service.
        if (WindowsServiceHelper.ManageServiceIfRequested(Environment.GetCommandLineArgs()))
            return;

        ServiceBase[] ServicesToRun;
        ServicesToRun = new ServiceBase[]
            {
                new Service1()
            };
        ServiceBase.Run(ServicesToRun);
    }
}

WindowsServiceHelper

public static class WindowsServiceHelper
{
    private static readonly string[] InstallArguments = new[] {"/i", "/install", "-i", "-install"};
    private static readonly string[] UninstallArguments = new[] {"/u", "/uninstall", "-u", "-uninstall"};

    public static void AttachConsole()
    {
        AllocConsole();
    }

    public static bool ManageServiceIfRequested(string[] arguments)
    {
        try
        {
            if (!arguments.Any(x => InstallArguments.Contains(x)) &&
                !arguments.Any(x => UninstallArguments.Contains(x)))
                return false;

            AttachConsole();

            var serviceFile = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "InstallUtil.InstallLog");
            if (File.Exists(serviceFile))
                File.Delete(serviceFile);

            if (arguments.Any(x => InstallArguments.Contains(x)))
                ManagedInstallerClass.InstallHelper(new[] {Assembly.GetExecutingAssembly().Location});
            else if (arguments.Any(x => UninstallArguments.Contains(x)))
                ManagedInstallerClass.InstallHelper(new[] {"/u", Assembly.GetExecutingAssembly().Location});
            else
                return false;
        }
        catch (Exception exception)
        {
            Console.WriteLine("Error: " + exception.Message);
        }

        Console.WriteLine("Service configuration is done. Press any key to exit console");
        Console.ReadKey();

        return true;
    }


    public static bool RunAsConsoleIfRequested<T>() where T : ServiceBase, new()
    {
        if (!Environment.CommandLine.Contains("-console"))
            return false;

        AttachConsole();

        var service = new T();
        var onstart = service.GetType().GetMethod("OnStart", BindingFlags.Instance | BindingFlags.NonPublic);

        var args = Environment.GetCommandLineArgs().Where(name => name != "-console").ToArray();
        onstart.Invoke(service, new object[] {args});

        Console.WriteLine("Your service named '" + service.GetType().FullName +
                            "' is up and running.\r\nPress 'ENTER' to stop it.");
        Console.ReadLine();

        var onstop = service.GetType().GetMethod("OnStop", BindingFlags.Instance | BindingFlags.NonPublic);
        onstop.Invoke(service, null);
        Console.WriteLine("Service is stopped.  Press any key to exit console");
        Console.ReadKey();
        return true;
    }

    [DllImport("kernel32")]
    private static extern bool AllocConsole();
}