I just changed my dev PC to win10. I checked out my code from local git server, the current project I am working on is an aspnet.core project. The project works fine in my old win7 PC and asp-for marked as purple. New PC installed VS2015 with update 3 and .net core tools preview 2. I don't know if I am missing anything here, the tag helper like @URL and @Model works fine, but asp-for not marked as purple and it is not recognized by the IntelliSense. When I launch the app, it seems that the app works fine with the old asp-for code. My win10 PC is in an enterprise environment and tried to run VS as admin and it still cannot recognize the "asp-for"