create new gist を試してみるよ

HomeController.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace SampleAppBase.Controllers
{
    public class HomeController : Controller
    {
        public ActionResult Index()
        {
            ViewBag.Message = "ASP.NET MVC へようこそ";

            return View();
        }

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

わーい、普通に動いたー

どもですー