StravaSharp makes Strava V3 API consumable in .NET projects.
Portability is essential by design. You can use this library on any platform that supports .NET Standard 2.0 (.NET Framework 4.6.1+ Mono 5.4+, UWP 10.0+, Xamarin.iOS 10.14+, Xamarin.Android 8.0+, .NET Core, .NET 5.0+, Unity, etc.)
Here you can find some info about how to start integrating StravaSharp into your environment.