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AvaloniaUI / Avalonia


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



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A multi-platform .NET UI framework. It can run on Windows, Linux, Mac OS X, iOS and Android.

Desktop platforms:

Mobile platforms:


Avalonia is delivered as a NuGet package. You can find the packages here: (stable(ish), nightly)

You can install the package like this: Install-Package Avalonia -Pre

Bleeding Edge Builds

Try out the latest build of Avalonia available for download here:

Try out the ControlCatalog to give it a quick demo.


Avalonia is a multi-platform windowing toolkit - somewhat like WPF - that is intended to be multi- platform. It supports XAML, lookless controls and a flexible styling system, and runs on Windows using Direct2D and other operating systems using Gtk & Cairo.

Current Status

Avalonia is now in alpha. What does "alpha" mean? Well, it means that it's now at a stage where you can have a play and hopefully create simple applications. There's now a Visual Studio Extension containing project and item templates that will help you get started, and there's an initial complement of controls. 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.


As mentioned above, Avalonia is still in alpha and as such there's not much documentation yet. You can take a look at the getting started page for an overview of how to get started but probably the best thing to do for now is to already know a little bit about WPF/Silverlight/UWP/XAML and ask questions in our Gitter room.

There's also a high-level architecture document that is currently a little bit out of date, and I've also started writing blog posts on Avalonia at

Contributions are always welcome!

Building and Using

See the build instructions here


Please read the contribution guidelines before submitting a pull request.