Rich Lander

@eggersa: I believe that the code is all in corefx. See example: https://github.com/dotnet/corefx/tree/master/src/Microsoft.Win32.Registry

@Jason - Nothing specific to say about PowerShell Core. What are you looking for?

On System.Text.Formatting, it is still experimental. We might productize it in the future but not for .NET Core 2.1.

https://github.com/dotnet/corefxlab/tree/master/src/System.Text.Formatting

@ZippyV - Yes, System.Drawing has a hard dependency on Windows technology. Our best guidance is to use one of the alternatives that are available on NuGet. See https://blogs.msdn.microsoft.com/dotnet/2017/01/19/net-core-image-processing/

We have been working closely with Xamarin, who provide a great solution for using C# and .NET to build apps for iOS and Android. You can read Soma's TechEd post, where he specifically talks about Xamarin and this scenario.

The Xamarin solution is a native platform solution. You build native UI with Xamarin, as opposed to a write-once hybrid UI. You can, however, share all of your business logic across iOS and Android apps. The same is true with Windows apps, which are supported by Visual Studio, not Xamarin.  

Thanks -- Rich Lander [MSFT] -- .NET Team

See this blog post from the .NET Team, on the CLR GC Updates: https://blogs.msdn.com/b/dotnet/archive/2012/07/20/the-net-framework-4-5-includes-new-garbage-collector-enhancements-for-client-and-server-apps.aspx