什么被认为是直接的asp.net？ （不是mvc而不是webforms）

I know the difference between ASP.NET webforms and ASP.NET MVC and I've seen quite a few videos explaining that they both run on top of ASP.NET (and I've used both). However, my question is, how would one develop right on top of ASP.NET without webforms or mvc.net? Would this be the equivalent of having a project with only .ASHX files?I know the difference between ASP.NET webforms