Wouldso would I run each of them under one primary website, say world wide web.example.com, that is written and used utilizing a Visual Studio ASP.Internet MVC web application project, and where an ASP.Internet Web Forms website, would run from the subdirectory from the primary site, say world wide web.example.com/myapp?

See Hanselman's blog publish. The fundamental idea is you give a regular WebForm for your MVC project, then tell the routing engine to disregard that path when you are performing MVC routing.