WinUI 3
WinUI 3 is a native user interface framework for building modern Windows desktop applications, providing a set of controls, styles, and features that leverage the Fluent Design System. It is the evolution of the UWP XAML framework, decoupled from the Windows SDK to enable use in various Windows app types, including Win32, .NET, and C++ applications. The framework offers high-performance, accessible UI components that integrate seamlessly with Windows 10 and 11.
Developers should learn WinUI 3 when creating Windows desktop applications that require a modern, native look and feel with support for the latest Windows features, such as dark mode, touch input, and accessibility. It is particularly useful for building productivity tools, enterprise software, or consumer apps that target the Windows ecosystem, as it provides a consistent UI experience across different Windows versions and device form factors. Using WinUI 3 ensures apps are future-proof and can leverage Microsoft's ongoing updates to the Fluent Design System.