For more than 12 years now, the .NET framework has been the programming model for developers who want to build apps for Windows. But in its efforts to take many of its developer tools cross-platform, Microsoft today announced that it plans to take .NET to both the Mac and Linux soon and that it is open-sourcing most of the full server-side .NET core stack (not client-side .NET), starting with the next version.
Read the full article at
http://techcrunch.com/2014/11/12/microsoft-takes-net-open-source-and-cross-platform/