Microsoft releases WinUI 3 - Project Reunion 0.5 Preview to help devs make modern Windows 10 apps

Best Microsoft Surface Book Accessories of 2017
Best Microsoft Surface Book Accessories of 2017 (Image credit: Windows Central)

What you need to know

  • Microsoft just released the WinUI 3 Project Reunion 0.5 preview.
  • It is the first release of Win UI 3 that ships inside the Project Reunion package.
  • The preview also adds support for in-app acrylic and several other options.

Microsoft just released the WinUI 3 - Project Reunion 0.5 Preview. This release is the first time that WinUI 3 ships inside of the Project Reunion package and should make it easier for developers to take advantage of modern APIs for their apps.

In addition to making it a bit easier to install the latest tools for app development, this preview also adds new options.

Here's what's new in WinUI 3 for the Project Reunion 0.5 preview:

  • In-app acrylic is now supported!
  • The Pivot control is no longer supported, and has been deprecated in WinUI 3. We recommend using the NavigationView control for your in-app navigation scenarios.
  • WinUI 3 and Project Reunion will be supported down-level to Windows 10 version 1809 - it requires build 17763 or newer.

The update also includes several bug fixes, which are detailed in a Microsoft doc.

See more

If you're new to developing with WinUI 3, here's a description of if from Microsoft:

Windows UI Library (WinUI) 3 is a native user experience (UX) platform for building modern Windows apps. It works with both desktop/Win32 and UWP apps, and includes Visual Studio project templates to help get started building apps with a WinUI-based user interface as well as a NuGet package that contains the WinUI libraries.

In more simple terms, Project Reunion is an effort that helps make modern Windows apps. Developers can use a number of languages and setups to create apps that will work well on Windows 10 and Windows 10X going forward.

Sean Endicott
News Writer and apps editor

Sean Endicott brings nearly a decade of experience covering Microsoft and Windows news to Windows Central. He joined our team in 2017 as an app reviewer and now heads up our day-to-day news coverage. If you have a news tip or an app to review, hit him up at