Xamarin was a company that produced several things. The AOT toolchain was fully integrated as a first party part of .NET 5.0. Site note: 5 eliminates "framewor

Xamarin was a company that produced several things. The AOT toolchain was fully integrated as a first party part of .NET 5.0. Site note: 5 eliminates "framework" and "core"; 5 is technically a descendent of the core family (also skipping 4.x versioning, as it overlaps with framework 4.x), but satisfies all the requirements of apps that use framework 4.x. Ergo, "framework" is available on non-Windows targets and you no longer need to choose. Xamarin also produced an entire UI framework. WinUI 3 (/w MAUI for non-Windows) is the intended upgrade path of Xamarin Forms, while the rest of Xamarin UI that isn't part of Forms lives on either in WinUI 3 or has designated replacements. In many cases, the upgrade is merely changing your `using` lines. Side note: Uno has been using non-Forms Xamarin UI like this for years, substituting Xamarin's functionality when you're not on Windows.