Razor Host Factory error

Question

I get a MvcWebRazorHostFactory error trying to run my app, but it's not an MVC app at all. I have the following web packages installed via nuget:

Microsoft ASP.NET Razor
Microsoft ASP.NET Web API 2.1
Microsoft ASP.NET Web Pages

My app is angularjs front end using razor views (.cshtml). I don't understand why I keep getting this error.

An exception of type 'System.InvalidOperationException' occurred in System.Web.WebPages.Razor.dll but was not handled in user code

Additional information: Could not locate Razor Host Factory type: System.Web.Mvc.MvcWebRazorHostFactory, System.Web.Mvc, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35

And here is the razor section in my web.config:

<system.web.webPages.razor>
<host factoryType="System.Web.WebPages.Razor.WebRazorHostFactory, System.Web.WebPages.Razor, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<pages pageBaseType="System.Web.WebPages.WebPage">
  <namespaces>
    <add namespace="System.Web.Configuration" />
    <add namespace="System.Web.Optimization" />
    <add namespace="System.Web.Routing" />
  </namespaces>
</pages>

Answer 1

I resolved this issue by setting System.Web.Mvc.MvcWebRazorHostFactory, System.Web.Mvc Version to 5.2.0.0 and it worked, finally! Why 5.2.0.0? Same version as NuGet Microsoft ASP.NET project.

So, the line in /Views/Web.Config should be:

<host factoryType="System.Web.Mvc.MvcWebRazorHostFactory, System.Web.Mvc, Version=5.2.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />