📖 About

Avalonia is a cross-platform UI framework for dotnet, providing a flexible styling system and supporting a wide range of platforms such as Windows, macOS, Linux, iOS, Android and WebAssembly. Avalonia is mature and production ready and is used by companies, including Schneider Electric, Unity, JetBrains and GitHub.

Considered by many to be the spiritual successor to WPF, Avalonia UI provides a familiar, modern development experience for XAML developers creating cross-platform applications. While Avalonia UI is similar to WPF, it isn't a 1:1 copy, and you'll find plenty of improvements.

For those seeking a cross-platform WPF, we have created Avalonia XPF, enabling WPF applications to run on macOS and Linux with little to no code changes. Avalonia XPF is a commercial product and is licensed per-app, per-platform.

Blog

To see the latest announcements and read about the state of Avalonia, check out the Avalonia UI Blog.

Sponsorship

Avalonia development is supported by the generous sponsorship of Devolutions.

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🚀 Getting Started

See our Get Started guide to begin developing apps with Avalonia UI.

Visual Studio Code

The Avalonia for Code extension gives you everything you need to build cross-platform .NET apps. XAML previewing, code completion, diagnostics, and code navigation, all inside the world's most popular editor. It's the fastest way to get started with Avalonia.

Visual Studio 2022 & 2026

The Avalonia Visual Studio Extension contains project and control templates, a live XAML previewer, code completion, and full diagnostics directly into Visual Studio.

JetBrains Rider

JetBrains Rider supports for Avalonia.

Code completion, inspections and refactorings are supported out of the box. To enable previewing XAML, you will require a 3rd party, community-maintained extension: https://plugins.jetbrains.com/plugins/dev/14839 to plugin repositories and install AvaloniaRider plugin.

Avalonia Packages

Avalonia is delivered via NuGet package manager. You can find the packages here: https://www.nuget.org/packages/Avalonia/

Use these commands in the Package Manager console to install Avalonia manually:

Install-Package Avalonia
Install-Package Avalonia.Desktop

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Bleeding Edge Builds

We also have a nightly build which tracks the current state of master. Although these packages are less stable than the release on NuGet.org, you'll get all the latest features and bugfixes right away and many of our users actually prefer this feed!

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Learning

Documentation

Documentation can be found at https://docs.avaloniaui.net.

Tutorials

We also have a tutorial over there for newcomers.

Samples

We have a range of samples to help you get started.

Breaking Changes

You can also see what breaking changes between Avalonia 11 and Avalonia 12.

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Building and Using

See the build instructions here.

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Contributing

This project exists thanks to all the people who contribute. Please read the contribution guidelines before submitting a pull request.

Code of Conduct

This project has adopted the code of conduct defined by the Contributor Covenant to clarify expected behavior in our community. For more information, see the Code of Conduct.

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Security

If you discover a security vulnerability in any of our SDKs, tools, services, or repositories, please help us keep the community safe by reporting it responsibly.

You can report security vulnerabilities by emailing security@avaloniaui.net.

Please avoid disclosing the issue publicly until we have had a reasonable amount of time to investigate and release a patch or mitigation. We review all legitimate reports and will work with you to quickly resolve the issue.

Please note that Avalonia does not operate a bug bounty programme.

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Licence

Avalonia is licenced under the MIT licence.

XPF - cross-platform WPF

Unleash the full potential of your existing WPF apps with our cross-platform UI framework, enabling WPF apps to run on macOS and Linux without requiring expensive and risky rewrites.