Microsoft Released Windows App SDK 2.5 Experimental

The update introduces new native controls and resolves memory growth issues within the WinUI framework.

Updated on Oct. 2, 2026 in Software

Isometric editorial illustration showing a stack of matte geometric blocks and modular components in deep teal, mustard, and oxblood. — Microsoft released the Windows App SDK 2.5 Experimental, introducing native UI controls and resolving memory performance issues within its WinUI framework. AI Illustration. Upload story photo >

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Microsoft has launched the Windows App SDK 2.5 Experimental, bringing new native TableView and Chart controls to its WinUI framework. The release specifically targets memory performance bugs occurring during resource resolution.

Why it matters

By refining the WinUI framework for Windows 11, Microsoft aims to reduce developer reliance on web-based alternatives. The update seeks to stabilize performance for building high-quality, native desktop applications.

The 2.5 version introduces native TableView controls that support grouping, sorting, filtering, and keyboard resizing. It also includes patches for memory leaks linked to visual-state storyboards.

The players

Microsoft

A global technology corporation that develops the Windows operating system and its associated development frameworks.

WinUI

The native user interface framework used for building modern Windows 11 applications.

The details

This SDK update addresses specific technical flaws that previously caused memory usage to climb during storyboard creation. By providing native charting and data grid tools, Microsoft hopes to improve the performance and consistency of first-party Windows apps.

September 29, 2026: Windows App SDK 2.5 Experimental released.
May 2026: The Build 2026 developer conference took place.

The Tech Race

This release reflects an ongoing effort to bridge the performance gap between native desktop tools and web-based platforms. Microsoft is aggressively updating the WinUI framework to ensure native development remains a viable alternative for Windows 11 software engineers.

Developers can now utilize native controls to improve application responsiveness and stability on Windows 11. These changes reduce the overhead typically required for complex resource resolution and UI management.

The takeaway

Developers focusing on Windows-native experiences should integrate these experimental controls to test for stability improvements. This release marks a shift toward more robust performance standards for internal Windows shell development.