If you want minimal you could always use something like glfast https://github.com/procedural/glFast
208 karma · joined June 26, 2015
By the way, Midori[2] was written in C#. Granted it had its own AOT compiler and started to diverge into a different language, but nevertheless, it was C#. I'd suggest looking through Joe Duffy's blog posts[3] as he explains it better than I could.
[1] https://github.com/redox-os/redox [2] https://en.wikipedia.org/wiki/Midori_(operating_system) [3] http://joeduffyblog.com/2015/12/19/safe-native-code/
Overall this project looks interesting. I'm interested to see where it goes in the future and what design trade offs end up being implemented.