Re:.NET Standard 2.1
by Nelkins on Monday November 05, 2018 @02:10PM
(#18384995)
Not WPF per se, but if you're looking for something similar check out https://github.com/AvaloniaUI/Avalonia
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Xamarin Forms also has WPF, OSX, and GTK renderers, so it might be an option. Based on GitHub activity it looks like they're being worked on fairly actively, too.
You can also use QML with .NET Core.
https://github.com/qmlnet/qmlnet
It is stable, I'm currently using it in production (https://medxchange.com/4klear-all-in-one-camera-recorder/)
PS: I'm the author.