Project Reunion: Microsoft releases new preview of WinUI 3

It should follow in two more pre-releases this year. WinUI 3 allows the development of .NET and C ++ apps for Windows 10. According to Microsoft, the platform is also the key component of the Project Reunion.

Microsoft has released the second preview of WinUI 3. The platform is part of the Project Reunion, with which the software company wants to close the gap between Win32 and UWP apps. Another preview of Ignite 2020 is scheduled to appear, followed by a first “upward compatible version” in November 2020.

Windows 10 1809 October 2018 update (Image: Microsoft)WinUI is Microsoft’s native UI platform for Windows 10. It can be used for .NET and C ++ apps for Windows 10 devices. WinUI is part of the Windows and Xbox OS shell, and according to Microsoft “of many apps, plus platforms such as Xamarin, Forms and React Native for Windows”.

The second pre-release version of WinUI 3, which has been available since the middle of the week, contains numerous bug fixes as well as updated documentation and new instructions. WinUI e can also be seen as a key component of Project Reunion.

Since launching the Universal Windows Platform, Microsoft has failed to convince the majority of its developers to create new UWP apps or to add UWP elements to their existing Win32 applications. This ultimately led to the establishment of two independent native app platforms for Windows that support each other differently. Since then, the Windows development team has been looking for a way to enable developers to simply create “Windows applications” that work on more than a billion Windows 10 devices.

Windows UI3: Roadmap (Image: Microsoft)

The upcoming pre-release, WinUI 3 Preview 3, should not only fix errors, but also offer new functions. That is probably why the publication is linked to the Ignite conference. Microsoft has announced another preview for November. For the first time, it should be suitable for developing apps that are intended for productive use. In addition, the WinUI code is to be placed under an open source license in November.

At the beginning of the year, the final version of WinUI 3 was expected before the end of the year. The new schedule does not specify a date for this, which allows the assumption that the final will be postponed to 2021.

At a question time about WinUI 3, Microsoft representatives stated that the Windows Presentation Foundation (WPF) team only belongs to the same organization as WinUI. In addition, ARM64 support for WPF is planned for the first half of 2021. They are also working on improving the XAML engine in the new uniform developer platform – this was even the main reason for the separation of WinUI from the core OS.

In the long term, Microsoft wants to create a unified app platform with the Project Reunion instead of just a unified Windows platform. This should give developers the opportunity to offer their apps for all existing Windows 10 devices.

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