WebForms and ASP.NET MVC co-existence

Question

I am trying to make a WebForms project and ASP.NET MVC per this question. One of the things I've done to make that happen is that I added a namespaces node to the WebForms web.config:

<pages styleSheetTheme="Default">
  ...
  <namespaces>
    <add namespace="System.Web.Mvc"/>
    <add namespace="System.Web.Mvc.Ajax"/>
    <add namespace="System.Web.Mvc.Html"/>
    <add namespace="System.Web.Routing"/>
  </namespaces>      
</pages>

However, when I try to start the project, I get an error stating: "Compiler Error Message: CS0234: The type or namespace name 'Mvc' does not exist in the namespace 'System.Web' (are you missing an assembly reference?)"

I have System.Web.Mvc referenced. What is the issue?

Answer 1

Add System.Web.Mvc in the compilation section,

<compilation debug="true">
    <assemblies>
        <add assembly="System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
        <add assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
        <add assembly="System.Web.Abstractions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
        <add assembly="System.Web.Routing, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
        <add assembly="System.Web.Mvc, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
        </assemblies>
</compilation>