@if (Session.CurrentUser == null)
                        {
                            <li>@Html.ActionLink("Register", "Register", "Account")</li>
                            <li>@Html.ActionLink("Login", "Login", "Account")</li>
                        }

public class BaseController : Controller
    {
        protected Services Services { get; private set; }
        protected new SessionWrapper Session { get { return SessionWrapper.Instance; } }
        protected ConfigWrapper Config { get { return ConfigWrapper.Instance; } }

        public BaseController()
        {
            Services = new Services();
        }
    }