Microsoft has recently released an update for the WinUI 3 Gallery app, introducing new icons and a design guide.
WinUI 3 Gallery is a reference app that developers can use as a guide for building applications using the Windows App SDK and WinUI 3 controls. It serves as a guide to integrating modern UI elements into Windows applications, explaining how to add actions and media, providing layout examples, and more. Developers can find links to documentation and source code on GitHub (WinUI 3 is an open-source framework). The newly added design guide guides developers on layout, icons, colors, and accessibility.
Download the WinUI 3 Gallery app: