- Create a C # Xamarin Forms Application
- Add C # PCL
- Add F # PCL
- Try adding a link from C # PCL to F # PCL
-> In the link dialog you will see: Incompatible structure Definition:: NetFramework = 4.5; Profile = Profile78)

Tips from other similar questions that are marked as resolved do not work. For instance. adding a link manually will not compile. I don’t know where to start figuring this out. Is this a compiler problem, xamarin problem? I don't think this is the last one since it does not work with VS 2015 either.
Update 10.20.2016
Bugrequest and Gitrepo: https://bugzilla.xamarin.com/show_bug.cgi?id=44976