How to get the current Windows user with ASP.NET Core RC2 MVC6 and IIS7

Question

I have an intranet site built in MVC6 using ASP.NET Core RC2. I want to get the Windows username of the person accessing the intranet site.

So if Jim goes to the in

Answer 1

For anyone else using Windows Authentication on an Intranet app, who just wants to be able to retrieve info about a user, it's simpler that you might think.

In your controller, this line will grab the user name of the current user in DOMAIN\username form.

var userId = this.User.Identity.Name;

I spent some time looking through the other answers before realizing that most of them assumed I was implementing Individual accounts to be authenticated against AD, not out of the box Windows Authentication.