I received a fresh laptop this week and after installing a fresh copy of Visual Studio 2017 Professional, I started getting the following error when trying to add a reference to a project.
I prefer to keep my System directives at the top. Unfortunately the default settings is to sort everything alphabetically. To keep your System directives at the top when sorting the using clauses you can enable the following setting.
This is the #1 thing that I switch on when working on a newly installed Visual Studio. The option “Track Active Item in Solution Explorer” always selects the file you have open in the solution explorer.