Avalonia - A multi-platform .NET UI framework (formerly known as Perspex)

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Avalonia is a WPF-inspired cross-platform XAML-based UI framework providing a flexible styling system and supporting a wide range of OSs: Windows (.NET Framework, .NET Core), Linux (GTK), MacOS, Android and iOS.Avalonia is now in alpha. This means that framework is now at a stage where you can have a play and hopefully create simple applications. There's still a lot missing, and you will find bugs, and the API will change, but this represents the first time where we've made it somewhat easy to have a play and experiment with the framework.

http://avaloniaui.net
https://github.com/AvaloniaUI/Avalonia

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