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This article provides a high-level overview of what's new with Windows Presentation Foundation (WPF) in .NET 11 Preview 4. For detailed information, see Release announcements. Use the release announcements to get an overview of the entire .NET 11 release.
.NET 11 Preview 4 was released in May 2026.
Release announcements
Each release announcement provides detailed information about WPF changes for .NET 11:
Bug fixes
- WPF prevents crashes from Desktop Window Manager (DWM) failures and fixes Fluent window backdrop and background issues on Windows 10.
- WPF fixes an
InvalidOperationExceptionthat occurs whenWeakEventTable.Purgemodifies the data table during enumeration withEnableWeakEventMemoryImprovementsenabled. The fix defers table updates during purge to avoid invalidating the enumerator.
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