WinUI 3 in Windows App SDK 2.6.4 includes reliability fixes for text controls during app shutdown, ItemsView, and WebView2, plus a fix for false IntelliSense errors in VS Code. It is available through the Microsoft.WindowsAppSDK 2.6.4 NuGet package.

Bug fixes:

• Fixed an access violation crash that could occur during app shutdown when a text control, such as a TextBox or RichEditBox, was still alive while the XAML core was being torn down.
• Fixed a crash in ItemsView when the target of StartBringItemIntoView was collapsed or recycled before the scroll completed (microsoft/microsoft-ui-xaml#11865).
• Fixed a crash that could occur when a WebView2 control received focus while still initializing and its parent window was temporarily disabled when initialization finished.
• Fixed false IntelliSense errors on XAML-generated members, such as InitializeComponent and x:Name fields, in WinUI 3 C# projects edited in VS Code with C# Dev Kit. To opt out, set the EnableWinUIDesignTimeGeneratedXamlCompileItems property to false.

For the full set of changes across Windows App SDK 2.6.4, see the Windows App SDK 2.6.4 release notes.

Try it out

• Install the Microsoft.WindowsAppSDK 2.6.4 NuGet package.
• Download and update the WinUI Gallery to see the WinUI 3 updates firsthand.