4.2 Avalonia is the open source alternative to WPF
Wasabi Wallet
Avalonia is an open-source, cross-platform UI framework built as a WPF alternative for projects like Wasabi Wallet. The developers used hard-won knowledge of WPF's design to eliminate architectural mistakes from the start, achieving improvements that backward-compatible evolution could never permit. Starting from a blank slate with hindsight proved more effective than inheriting WPF's legacy const

https://relay.towardsliberty.com/d85efec4b51ea47c954a7b814e0454ffe20d2ee796f48b804e6a223beacdcd8e.mp4