Microsoft is planning more APIs, an upgrade to the F# language, and expanded processor and Linux support as part of a road map for its open source version of the .Net Core runtime. The .Net Core is a multi-platform and modular subset of the .Net Framework programming model. The was originally released as a 1.0 version earlier this year, along with ASP.Net Core 1.0 Web application framework.
Microsoft also plans to accommodate ARM 32/64 processors in the .Net Core runtime and libraries next year, both on Windows and Linux, but on different schedules.
Microsoft also says that in the late-2016 or early-2017 timeframe, a minor update will be released for .Net Core that will move tooling from the xproj/project.json project system to .csproj/MSBuild so all .Net projects can use the same build system.