microsoft/WindowsAppSDK v2.0-exp4

2.0 Experimental 4 (2.0.0-experimental4) 🧪

Repository: microsoft/WindowsAppSDK

Tag: v2.0-exp4

Published: 2026-01-13T22:42:50Z

Prerelease: yes

Release notes:

Windows App SDK 2.0-Experimental4 (2.0.0-experimental4)

WinAppSDK 2.0.0 Experimental 4 is the latest experimental version of WinAppSDK providing new features and improvements to the platform.

What's new in WinAppSDK 2.0 Experimental 4:

• Onnx Runtime updated to mainline version 1.24 for improved compatibility and stability.
• Decreased the size of Microsoft.Windows.AI.MachineLearning.dll by approximately 160 KB
• Introduced new APIs to lookup statistics of items being indexed.
• New support for query cancellation to allow apps to run a query and update it if there is a new query.
• Video Scaler is now disposable, improving resource management and lifecycle control.
• The Video Super Resolution model is now compiled and cached to improve performance and reduce repeated initialization costs.
• Removed the requirement for explicit WinML initialization when using Video Super Resolution.
• The FlowLayout control now uses ItemSpacing and LineSpacing terminology.
• The WrapPanel control now uses ItemSpacing and LineSpacing terminology.
• Implemented the IXamlPredicate interface to define custom predicates that integrate seemlessly with XAML's conditional namespace syntax.
• Added WinUI tools and scripts for use by external developers to build and test Windows.
• Deprecated the DependencyObject.Dispatcher API in WinUI.
• Deprecated the Window.Current API in WinUI.
• Deprecated FocusManager.GetFocusedElement API in WinUI.
• Renamed the SystemBackdropHost to SystemBackdropElement in WinUI.
• Renamed the Microsoft.Windows.AI.Search.Experimental.AppContentIndex namespace to Microsoft.Windows.Search.AppContentIndex.

Bugs fixed:

• Fixed “Class not registered” errors when using self-contained deployment with Windows ML. Developers using self-contained deployment no longer need to register all the Foundation package activatable classes that were used internally.
• Fixed a potential crash occurring on process shutdown when using Windows ML.
• Fixed the ImageForegroundExtractor API routing path so calls reach the correct endpoint.
• Ensured execution provider install and download progress is correctly forwarded to apps during package deployment.
• Fixed a crash in SystemBackdrop when the target disconnects by guarding invalid disconnection paths.
• Fixed an issue that prevented Windows AI APIs from being available for some devices.

To see everything that's new and changed, see the full [Windows App SDK 2.0 Experimental release notes](https://aka.ms/windowsappsdk/2.0/2.0.0-experimental4/release-notes).

Try it out

• Download the 2.0.0-experimental4 NuGet package to use WinAppSDK 2.0 in your app.
• Download and update the WinUI Gallery to see the WinUI 3 updates firsthand.

Getting Started

To get started using Windows App SDK to develop Windows apps, check out the following documentation:

• Install developer tools .
• Create a WinUI 3 app.
• Continue your development journey. -