Debugging Windows Services

CustomService.cs

  public partial class CustomService : ServiceBase
    {
        protected override void OnStop()
        {
            //normal shutdown code here
        }

        protected override void OnStart(string[] args)
        {
            //normal startup code here            
        }

        public void RunConsole(string[] args)
        {
            OnStart(args);

            if ((args.Length > 0) && (Array.IndexOf(args, "/console") != -1))
            {
                Console.WriteLine("Please press enter to continue...");
                Console.ReadLine();
            }

            OnStop();
        }

    }

ServiceStartRedirect.cs

 public class ServiceStartRedirect
    {
        #region Methods

        private static void Main(string[] args)
        {
            if ((args.Length > 0) && (Array.IndexOf(args, "/console") != -1))
            {
                var service = new CustomService();
                service.RunConsole(args);
            }
            else
            {
                ServiceBase[] ServicesToRun;
                ServicesToRun = new ServiceBase[]
                {
                    new CustomService()
                };
                ServiceBase.Run(ServicesToRun);
            }
        }

        #endregion
    }

In the properties of the project, under Debug -> Start Options -> Command Line Arguments: add

/console

Also make sure in Properties -> Application -> Output type: is set to

Console Application   

and
Startup object: is set to

ServiceStartRedirect