Microsoft makes native WinUI apps easier with C#-based Reactor framework

Microsoft introduced Microsoft.UI.Reactor, an experimental C# framework that renders WinUI controls so developers can build native Windows apps without XAML. It includes 60+ built-in code checks and cuts a simple sample app from five files to a single C# file.

• Reactor renders WinUI controls and does not replace the platform or XAML
• A simple sample app drops from five files to one C# file
• 60+ built-in checks cover dark mode, accessibility and performance
• The framework preserves app state across most code edits