@UseSystem, System.core

  <system.web>
    <compilation debug="true" targetFramework="4.7.1">
      <assemblies>
        <add assembly="System.Core, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
        <add assembly="System.Data.Linq, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" />
        <add assembly="System.Web.Mvc, Version=5.2.3.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
      </assemblies>
    </compilation>
    <httpRuntime targetFramework="4.7.1" />
    <!-- ... ... -->
  </system.web>
Dead Dragonfly