Probably more important:
Microsoft starts to open source .NET and take it cross-platform
to Mac, Linux:
http://venturebeat.com/2014/11/12/microsoft-starts-to-open-source-net-and-take-it-cross-platform-to-mac-linux/
https://github.com/Microsoft/dotnet
License
.NET open source projects typically use either the MIT or Apache
2 licenses for code. Some projects license documentation and
other forms of content under Creative Commons Attribution 4.0.
See specific projects to understand the license used.