postsharp with MVC

gistfile1.cs

using System;
using System.Web.Mvc;
using PostSharp.Aspects;

namespace MvcApplication1WithPostSharp.Controllers
{
    public class HomeController : Controller
    {
        [MyExitAspect]
        public ActionResult Index()
        {
            Session["stuff"] = DateTime.Now.ToString();
            ViewBag.Message = "Welcome to ASP.NET MVC!";

            return View();
        }

        public ActionResult About()
        {
            return View();
        }
    }

    [Serializable]
    public class MyExitAspect : OnMethodBoundaryAspect
    {
        public override void OnExit(MethodExecutionArgs args)
        {
            var controller = args.Instance as Controller;
            if (controller != null)
            {
                var session = controller.HttpContext.Session;
                controller.Response.Write(session["stuff"]);
            }
        }
    }
}