What would you think if you were me?! How closely does LINUX resemble AmigaDOS? Is it as transparent as the good old Amiga?
In my personal opinion, of all OS I know, LINUX is most dissimilar to AmigaOS !
It is not intuitive. You have to read several pages of manuals to do the simplest things.
Getting new Hardware working, is close to impossible for a "normal" user.
In my opinion, even the actual windows versions are closer to AmigaOS then LINUX !
If you want AmigaOS feeling, then AROS is the best choice.
But it is not usable for .NET development.
If you need .NET development, but don't want to use WINDOWS or LINUX, then take a look at
http://www.reactos.org/I am not sure if .NET/MONO is already working there, but there is a good chance, as ReactOS is an OpenSource Windows clone.