EXT.Net Razor WebPages @Html.X Helper not found v3.30

[Yemo]

Hello,

Am struggling to get an Ext.NET Razor webpages sample working. The test Visual Studio project I built is failing with the following:
'System.Web.WebPages.Html.HtmlHelper' does not contain a definition for 'X'

My web Config is as follows:

<configuration>
  <configSections>
    <section name="extnet" type="Ext.Net.GlobalConfig" requirePermission="false"/>
  </configSections>

  <extnet theme="Crisp" initScriptMode="Linked"/>

  <appSettings>
    <add key="webpages:Version" value="3.0.0.0"/>
    <add key="ClientValidationEnabled" value="true"/>
    <add key="UnobtrusiveJavaScriptEnabled" value="true"/>
    <add key="LocalLogging" value="False"/>
  </appSettings>

  <system.web>
    <compilation debug="true" strict="false" explicit="true" targetFramework="4.5">
      <assemblies>
      <add assembly="System.Web.WebPages, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
        <add assembly="System.Web.Mvc, Version=5.2.2.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
        <add assembly="System.Web.Helpers, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
        <add assembly="Ext.Net"/>
      </assemblies>
    </compilation>
    <httpRuntime targetFramework="4.5" 
                 enableVersionHeader="false" 
                 requestValidationMode="2.0"/>

      <pages validateRequest="false"
              pageParserFilterType="System.Web.Mvc.ViewTypeParserFilter, System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"
              pageBaseType="System.Web.Mvc.ViewPage, System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"
              userControlBaseType="System.Web.Mvc.ViewUserControl, System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35">
        <namespaces>
        <add namespace="System.Web.Helpers"/>
        <add namespace="System.Web.Routing"/>
        <add namespace="System.Web.WebPages"/>
        <add namespace="System.Web.Mvc"/>
        <add namespace="System.Web.Mvc.Ajax"/>
        <add namespace="System.Web.Mvc.Html"/>

        <add namespace="Ext.Net"/>
        <add namespace="Ext.Net.MVC"/>
      </namespaces>
      <controls>
        <add assembly="System.Web.Mvc, Version=5.2.2.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" namespace="System.Web.Mvc" tagPrefix="mvc"/>
        <add assembly="Ext.Net" namespace="Ext.Net" tagPrefix="ext"/>
      </controls>
    </pages>
    <httpHandlers>
      <add path="*/ext.axd" verb="*" type="Ext.Net.ResourceHandler" validate="false"/>
    </httpHandlers>
    <machineKey decryption="AES" validation="SHA1" decryptionKey="435D9CC99471D1E7C70FFEBA5EC71F28048BF9016605B82CC69B091FD317B294" validationKey="25C5D98CE093E77C2F886A6D8C6DA8FBC77CD764A1BF49E5D30CD123C5E19553"/>
  </system.web>
  <system.webServer>
    <defaultDocument>
      <files>
        <add value="index.cshtml"/>
      </files>
    </defaultDocument>
    <modules>
      <add name="DirectRequestModule" preCondition="managedHandler" type="Ext.Net.DirectRequestModule, Ext.Net"/>
    </modules>
    <handlers>
      <add name="DirectRequestHandler" verb="*" path="*/ext.axd" preCondition="integratedMode" type="Ext.Net.ResourceHandler"/>
    </handlers>
    <validation validateIntegratedModeConfiguration="false"/>
  </system.webServer>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30ad4fe6b2a6aeed"/>
        <bindingRedirect oldVersion="0.0.0.0-8.0.0.0" newVersion="8.0.0.0"/>
      </dependentAssembly>

      <dependentAssembly>
        <assemblyIdentity name="Ext.Net.Utilities" publicKeyToken="2c34ac34702a3c23"/>
        <bindingRedirect oldVersion="0.0.0.0-2.5.0" newVersion="2.5.0"/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Transformer.NET" publicKeyToken="e274d618e7c603a7"/>
        <bindingRedirect oldVersion="0.0.0.0-2.1.1" newVersion="2.1.1"/>
      </dependentAssembly>

      <!--MVC 5-->
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Helpers" publicKeyToken="31bf3856ad364e35"/>
        <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0"/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.WebPages" publicKeyToken="31bf3856ad364e35"/>
        <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="3.0.0.0"/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35"/>
        <bindingRedirect oldVersion="1.0.0.0-5.2.3.0" newVersion="5.2.3.0"/>
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
</configuration>

I then build a simple index.cshtml page with the following:

@using System.Web.Mvc
@using Ext.Net;
@using Ext.Net.MVC;
@{
    Layout = null;    
    var X = Ext.Net.Html.X();

    @Html.X().ResourceManager().Theme(Theme.CrispTouch)
    @RenderPage("~/Viewpage1.cshtml");
}

Global.asax has all the relevant code listings (copied from Ext.net MVC sample) which includes registering routes etc. But compiler still throws an exception 'System.Web.WebPages.Html.HtmlHelper' does not contain a definition for 'X'

[Yemo]

My Bad. Had assumed there was support for webform controls in Web Pages 2, and was mixing mvc razor with razor web pages.

Found a corresponding article on what I was attempting to achieve, but its not supported:
http://www.hanselman.com/blog/Mixing...SPNETMVC3.aspx