What started as a Windows project (unifying the then separate Phone and PC APIs) has since expanded through the Xamarin platforms (iOS and Android) and beyond. The latest NuGet package adds Apple tvOS, macOS and the recently announced Tizen .NET Preview.
The usual caveat applies that not all platforms support all functionality but there is already support for the Windows.Storage style file API, and Geolocation, Accelerometer and Gyrometer sensors, Badge and Toast notifications, VibrationDevice and PowerManager (obviously don’t expect all of these to be present in a Smart TV).
Currently there isn’t a unique NuGet platform ID for Tizen so the dll is “advertised” as .NET Standard 1.3. This will only work on Tizen and if you try to consume in any other .NET Standard project will result in errors. We’ll update this as and when a new NuGet TFM is supported.
I’ve also been updating the documentation with more platform information, so most classes should now have a table like the example below. I’d welcome any feedback on better ways to surface this information.