ASP.Net Configuration

I am using Visual Studio Community 2015 and Windows10 and developing a new asp web site. I am following the Walk through "Creating a web site with Membership and User Login". I am Configuring Membership and trying to create a membership User. To do so, it says at one point:  "On the web site menu, click ASP.Net Configuration" .
But on Visual Studio 2015, ASP.Net Configuration has disappeared from the Website menu options.

So what do I do? I have spent hours searching the Internet and various Microsoft Help facilities and forums: I have found nothing.
I am stuck and going desperate.. 
Would a smart and charitable soul tell me how I can create Membership User???

Thanks, Big Buzzard