ASP.NET MVC Beta 1 - where is Html.RenderPartial?

<% Html.RenderPartial("Controls/UserForm", ViewData); %>

<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="System.Linq"/>
 <add namespace="System.Collections.Generic"/>
</namespaces>

<add assembly="System.Web.Mvc, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>

<add namespace="System.Web.Mvc.Html"/>"