Hi everyone,
There are many useful Xamarin Plugins:
https://github.com/xamarin/XamarinComponents
Many of them support PCL and .Net Standard, i.e. you can write code once and run it "everywhere". But...
"Everywhere" as of now means Android/iOS and eventually UWP. This is because portability uses techniques such as Bait and Switch. Long story short - this is common abstraction PCL with platform specific implementation for every supported platform. Because Tizen.NET is new, virtually no plugin supports Tizen.NET as of now.
Everyone can contribute in these (and also other) plugins and nuget packages, adding Tizen.NET platform specific implementation.
But there's more. Read to know these plugins and nuget packages and their functionality. Even you are not ready to contribute, when you find them useful you can ask their author about Tizen.NET support.
Samsung made a wise step in supporting .NET in Tizen. They also create great development tools for Tizen.NET. Now it is our job to popularize, use and support Tizen.NET growing as platform to build great apps.
Plamen