title: Ajax.BeginForm in VS 2015 ASP.NET vNext missing?
body: <p>I read about @Html.BeginForm and also @Ajax.BeginForm in an earlier release of ASP.NET MVC for Razor Views. Then I opened VS 2015 to try both forms with ASP.NET vNext but I can't find the Ajax object. Am I missing something? Do I have to include some extra Nuget package? Is there some new way to use Ajax.BeginForm? Hasn't it been added yet to VS 2015 (MVC 6)? Was it removed? Or what?</p>
  
  <p>Note: I'm not interested in pure HTML/JavaScript alternatives.</p>