title: Manually upgraded from MVC3 to MVC4 Beta and getting "not valid @" sign errors
body: <p>I'm using Razor in both</p>
  
  <p>Any page that using the @ sign.  Its almost like either the System.Web.WebPages or System.Web.Helpers are not able to determine the Views</p>
  
  <p>Here is the actual error:</p>
  
  <p><strong>"@" is not valid at the start of a code block.  Only identifiers, keywords, comments, "(" and "{" are valid.</strong></p>
  
  <p>Here is my web.config that is in the /Views folder</p>
  
  <pre><code>&lt;?xml version="1.0"?&gt;
  
  &lt;configuration&gt;
  &lt;configSections&gt;
  &lt;sectionGroup name="system.web.webPages.razor" type="System.Web.WebPages.Razor.Configuration.RazorWebSectionGroup, System.Web.WebPages.Razor, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"&gt;
    &lt;section name="host" type="System.Web.WebPages.Razor.Configuration.HostSection, System.Web.WebPages.Razor, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" /&gt;
    &lt;section name="pages" type="System.Web.WebPages.Razor.Configuration.RazorPagesSection, System.Web.WebPages.Razor, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" requirePermission="false" /&gt;
  &lt;/sectionGroup&gt;
  &lt;/configSections&gt;
  
  &lt;system.web.webPages.razor&gt;
  &lt;host factoryType="System.Web.Mvc.MvcWebRazorHostFactory, System.Web.Mvc, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /&gt;
  &lt;pages pageBaseType="System.Web.Mvc.WebViewPage"&gt;
    &lt;namespaces&gt;
      &lt;add namespace="System.Web.Mvc" /&gt;
      &lt;add namespace="System.Web.Mvc.Ajax" /&gt;
      &lt;add namespace="System.Web.Mvc.Html" /&gt;
      &lt;add namespace="System.Web.Routing" /&gt;
    &lt;/namespaces&gt;
  &lt;/pages&gt;
  &lt;/system.web.webPages.razor&gt;
  
  &lt;appSettings&gt;
  &lt;add key="webpages:Enabled" value="false" /&gt;
  &lt;/appSettings&gt;
  
  &lt;system.web&gt;
  &lt;httpHandlers&gt;
    &lt;add path="*" verb="*" type="System.Web.HttpNotFoundHandler"/&gt;
  &lt;/httpHandlers&gt;
  
  &lt;!--
      Enabling request validation in view pages would cause validation to occur
      after the input has already been processed by the controller. By default
      MVC performs request validation before a controller processes the input.
      To change this behavior apply the ValidateInputAttribute to a
      controller or action.
  --&gt;
  &lt;pages
        validateRequest="false"
        pageParserFilterType="System.Web.Mvc.ViewTypeParserFilter, System.Web.Mvc, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"
        pageBaseType="System.Web.Mvc.ViewPage, System.Web.Mvc, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"
        userControlBaseType="System.Web.Mvc.ViewUserControl, System.Web.Mvc, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"&gt;
    &lt;controls&gt;
      &lt;add assembly="System.Web.Mvc, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" namespace="System.Web.Mvc" tagPrefix="mvc" /&gt;
    &lt;/controls&gt;
  &lt;/pages&gt;
  &lt;/system.web&gt;
  
  &lt;system.webServer&gt;
  &lt;validation validateIntegratedModeConfiguration="false" /&gt;
  
  &lt;handlers&gt;
    &lt;remove name="BlockViewHandler"/&gt;
    &lt;add name="BlockViewHandler" path="*" verb="*" preCondition="integratedMode" type="System.Web.HttpNotFoundHandler" /&gt;
  &lt;/handlers&gt;
  &lt;/system.webServer&gt;
  &lt;/configuration&gt;
  </code></pre>