The name does not exists in the current context

Most questions are related with old version of ASP.NET MVC. My question is related to latest .NET Core

build on Framework 4.6. I created a console application and standard class library. I installed all libraries needed for running WEB on .NET Core.

Everything is working fine, views are compiled fine and debugging views also working. Unfortunately,Visual Studio shows the following on any object in view:

The name does not exists in the current context.

How can I get rid of these red underlines?

I followed this: http://stackoverflow.com/questions/40128464/running-asp-net-core-mvc-as-a-console-application-project-without-net-core-sdk

Thank you very much.