You must add a reference to assembly 'netstandard, Version=2.0.0.0

Question

The project is an ASP.NET MVC Web App targeting the .NET Framework 4.6.1.

All of a sudden (some NuGet packages were upgraded) I started to get the following error du

Answer 1

The solution of Quango in is working but I prefer to resolve it by adding this code in my Web.config like new projects :