Microsoft.ui.xaml.2.8 Guide

: If you are hosting UWP controls in a WPF or WinForms app (XAML Islands), version 2.8 is often the highest version supported for stable interoperability. The Path Forward

: Users frequently encounter errors (like 0x80073CF3 ) when an application requires Microsoft.UI.Xaml 2.8 but the framework is missing or a conflicting version is present. microsoft.ui.xaml.2.8

: One of the most significant shifts was the enhanced support for the WebView2 control , based on the Chromium engine. This replaced the aging EdgeHTML-based WebView, providing better performance and modern web standard compatibility. : If you are hosting UWP controls in

You can customize the "accent color" or specific control styles by overriding resources inside the XamlControlsResources block: Version 2

: If a system is missing the framework, it can be manually installed by downloading the raw .nupkg from NuGet, extracting the .appx file from the tools\AppX directory, and running it using Add-AppxPackage .

is the NuGet package ID for WinUI 2 . Version 2.8 was a significant milestone as it introduced highly requested controls like InfoBadge and Expander and brought the API surface closer to WinUI 3.

After installation, you must reference the namespace in your XAML pages to use the controls.