"Midori was a research/incubation project to explore ways of innovating throughout Microsoft’s software stack. This spanned all aspects, including the programming language, compilers, OS, its services, applications, and the overall programming models. We had a heavy bias towards cloud, concurrency, and safety. The project included novel “cultural” approaches too, being 100% developers and very code-focused, looking more like the Microsoft of today and hopefully tomorrow, than it did the Microsoft of 8 years ago when the project began." [1]
Later some of this ideas became core features on Windows.
For a great overview about Mindori project: [1] http://joeduffyblog.com/2015/11/03/blogging-about-midori/