Question

I have just deployed a new MVC3 application, and after some efforts on my hosting provider’s side, MVC3 seems to be running OK, but now I get the following compilation error before anything on the site loads:

CS0246: The type or namespace name ‘Telerik’ could not be found (are you missing a using directive or an assembly reference?)

This occurs in web.config on the following line:

<add namespace="Telerik.Web.Mvc.UI" />

I know the DLL is present in the bin folder on the host, so I’m a bit lost as to what else could be wrong.

Answer 1

If you are using Razor this line:

<add namespace="Telerik.Web.Mvc.UI" />

must occur in ~/Views/web.config and not in ~/web.config. Could this be your case?

Like this:

<system.web.webPages.razor>
    <host factoryType="System.Web.Mvc.MvcWebRazorHostFactory, System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
    <pages pageBaseType="System.Web.Mvc.WebViewPage">
      <namespaces>
        <add namespace="System.Web.Mvc" />
        <add namespace="System.Web.Mvc.Ajax" />
        <add namespace="System.Web.Mvc.Html" />
        <add namespace="System.Web.Routing" />
        <add namespace="Telerik.Web.Mvc.UI" />
      </namespaces>
    </pages>
</system.web.webPages.razor>