public class HomeController : Controller
{
    public ActionResult Index()
    {
        return View();
    }

    public ActionResult Slow()
    {
        string ret = "started at " + DateTime.Now.ToString("HH:mm:ss") + "<br/>";

        System.Threading.Thread.Sleep(5000);

        ret += "finished at " + DateTime.Now.ToString("HH:mm:ss") + "<br/>";

        return Content(ret);
    }
}