c# - "public class MvcApplication : System.Web.HttpApplication"行处出现编译错误 MVC4

Question

在下面的代码中，它给了我“public class MvcApplication : System.Web.HttpApplication”行的编译错误

请帮我解决这个问题。

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

namespace Simple_Calendar
{
// Note: For instructions on enabling IIS6 or IIS7 classic mode, 
// visit http://go.microsoft.com/?LinkId=9394801
public class MvcApplication : System.Web.HttpApplication
{
    protected void Application_Start()
    {
        AreaRegistration.RegisterAllAreas();

        WebApiConfig.Register(GlobalConfiguration.Configuration);
        FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
        RouteConfig.RegisterRoutes(RouteTable.Routes);
    }
 }
}

Answer 1

我认为 System.Web.HttpApplication dll 已损坏，只需在引用中添加 dll