LINQ in Razor View Broken for VB - asp.net

Question

I'm trying to use LINQ in a Razor view (VB syntax) and I have the following:
Model.TypeList.Select(Function(i) ...)
Syntactically, everything is correct; the statement is correct, and the Model types are defined correct. However, I get the following error within design-time:
Error 12 'Select' is not a member of 'System.Collections.Generic.List(Of TypeItem)'
Obviously Select is a LINQ extension method, but it's not supported in my view, even though the DLL reference is there, and I added it as a namespace to the web.config files... Why is this basic feature not working?
I am using ASP.NET MVC 5.0, and note I'm using a custom base page class. EDIT: In the view I am using, I have the following imports:
#Imports System.Linq
#Imports System.Collections.Generic
My root web.config file has the following:
<system.web>
<compilation debug="true" targetFramework="4.5.1" />
<httpRuntime targetFramework="4.5" />
<pages>
<namespaces>
<add namespace="System.Collections.Generic"/>
<add namespace="System.Linq"/>
<add namespace="System.Web.Helpers" />
<add namespace="System.Web.Mvc" />
<add namespace="System.Web.Mvc.Ajax" />
<add namespace="System.Web.Mvc.Html" />
<add namespace="System.Web.Optimization" />
<add namespace="System.Web.Routing" />
<add namespace="System.Web.WebPages" />
</namespaces>
</pages>
My views wb.config has the following:
<system.web.webPages.razor>
<host factoryType="System.Web.Mvc.MvcWebRazorHostFactory, System.Web.Mvc, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<pages pageBaseType="Custom.MvcViewPage">
<namespaces>
<add namespace="System.Collections.Generic"/>
<add namespace="System.Linq"/>
<add namespace="System.Web.Mvc" />
<add namespace="System.Web.Mvc.Ajax" />
<add namespace="System.Web.Mvc.Html" />
<add namespace="System.Web.Optimization"/>
<add namespace="System.Web.Routing" />
</namespaces>
</pages>
</system.web.webPages.razor>
<appSettings>
<add key="webpages:Enabled" value="false" />
</appSettings>
<system.web>
<httpHandlers>
<add path="*" verb="*" type="System.Web.HttpNotFoundHandler"/>
</httpHandlers>
<pages
validateRequest="false"
pageParserFilterType="System.Web.Mvc.ViewTypeParserFilter, System.Web.Mvc, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"
pageBaseType="Custom.MvcViewPage"
userControlBaseType="Custom.MvcViewUserControl">
<controls>
<add assembly="System.Web.Mvc, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" namespace="System.Web.Mvc" tagPrefix="mvc" />
</controls>
</pages>
Note: the app works when it runs, so this is a design-time only error.

Answer 1

At the top of your view file, include:
#Imports System.Linq
Update:
On further inspection, System.Linq was properly included. However, I noticed that the Web.config had different values for the targetFramework attribute on the <httpRuntime> and <compilation> elements. Setting those to both be the same, namely 4.5.1, fixed the issue.
<httpRuntime targetFramework="4.5.1" />