cshtml開くと@usingで指定したパッケージが見つからないとエラーに

前からこんなだっけ?

I am adding a PagedList to my view and loosely following this Tutorial. I have installed the PagedList reference using Nuget, set up my controller as follows

public ViewResult Index(int page = 1)     {
         List<Part> model = this.db.Parts.ToList();
         const int pageSize = 20;
         return View(model.ToPagedList(page, pageSize));     } 

And written my view with the following model at the top

@model PagedList.IPagedList<RIS.Models.Part>

When I run the page I get the following error

Compiler Error Message: CS0246: The type or namespace name 'PagedList' could not be found (are you missing a using directive or an assembly reference?)  
Source Error:   
Line 27:      
Line 28:      
Line 29:     public class _Page_Areas_Parts_Views_Part_Index_cshtml : System.Web.Mvc.WebViewPage<PagedList.IPagedList<RIS.Models.Part>> { 

The PagedList dll is being properly loaded in my controller because when I take it out of my view everything works as expected. The CopyLocal property is set to 'True' and I have tried including the namespace in the Views\Web.Config in my specific Area. What else can I do to make the View see the Namespace?

asp.net mvc 3 - Namespace not found in MVC 3 Razor view - Stack Overflow

解決

~Views/web.configの system.web.webPages.razor/pages/namespaces にネームスペースを追加する

The first way is that use @using statement in .cshtml files, that imports a namespace to current file only, and the second: In the "web.config" file in "Views" directory of your project (notice it is not the main web.config in project's root), find this section:

<system.web.webPages.razor>
   <pages pageBaseType="System.Web.Mvc.WebViewPage">
     <namespaces>
       <add namespace="System.Web.Mvc" />
       <add namespace="System.Web.Mvc.Ajax" />
       <!-- etc -->
     </namespaces>
   </pages>
</system.web.webPages.razor>

asp.net - How to import a namespace in Razor View Page? - Stack Overflow

NuGetアップデートした時に消えたのかなぁ。