如何基于.NET Core创建ASP.NET项目，而不是基于完整的框架？

I was reading all about .NET Core after hearing about it for months. I got Visual Studio 2015, so I thought I would try it out. I go into File - New Project, choose ASP.NET Web Application, and see I can only choose a version of the full .NET Framework (such as 4.6). I was reading all about .NET Core after hearing