[SigmundA]

Singularity was a experimental OS written in a a variant of C# and .Net managed code by MS Research that ran using software isolated processes rather than hardware isolation, this is probably what they where referencing:

https://en.wikipedia.org/wiki/Singularity_(operating_system)

[kaba0]

http://joeduffyblog.com/2015/11/03/blogging-about-midori/

There is also a really great blog about Singularity’s “rebirth” experimental OS, Midori, that continued in its footsteps.