Hi Ron

GetPropertyValue

@using Umbraco.Web 

to the top of your View it should be available once more.

To save you having to add that at the top of every view, if you look inside the Views folder there should be an additional Web.Config file; inside which it will list all the namespaces to make available within Razor pages.

Is it possible during the upgrade this got mangled some how ? Have a look see if it is there, and contains the list of default namespaces.

  <system.web.webPages.razor>
    <host factoryType="System.Web.Mvc.MvcWebRazorHostFactory, System.Web.Mvc, Version=5.2.3.0, 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="Umbraco.Web" />
        <add namespace="Umbraco.Core" />
        <add namespace="Umbraco.Core.Models" />
<add namespace="Umbraco.Web.Mvc" />
    <add namespace="umbraco" />
        <add namespace="Examine" />
      </namespaces>
    </pages>
  </system.web.webPages.razor>