This was supplied for EPi 6 a few years ago: http://world.episerver.com/Blogs/Enes-Bajramovic/Dates/2010/4/EPiServer-CMS-6-XML-documentation-files/
It would help a lot if our developers could get access to the same thing for Epi7, and preferably the mediachase dll files as well.
Thanks in advance.
If you install for instance EPiServer CMS Core libs from EPiServer NuGet feed (http://nuget.episerver.com) code documentation files (e.g. EPiServer.xml) is coming as well. Just be sure to copy over to bin/ dir if missing to get VS IntelliSense over thoses types.
Not sure about Mediachase.