public partial class HostWinService : ServiceBase
    {
        ServiceHost _host;
        public HostWinService ()
        {
            InitializeComponent();
        }

        protected override void OnStart(string[] args)
        {
            _host = new ServiceHost(typeof(UserService));
            _host.Open();
        }

        protected override void OnStop()
        {
            _host.Close();
        }
    }