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Uno Platform 6.3 Adds .NET 10, Visual Studio 2026 Support
Uno Platform has released version 6.3 of its open source framework for building cross-platform .NET applications, introducing .NET 10 Preview support, Visual Studio 2026 compatibility, WebAssembly performance improvements, and enhanced productivity tools in its Hot Design visual designer.
Positioned as a framework that enables developers to build single-codebase apps for Windows, WebAssembly, iOS, Android, macOS, Linux, and more, Uno Platform continues to closely align with Microsoft's .NET ecosystem. In fact, Uno Platform helped with Microsoft's .NET 10 RC2. The team said Uno Platform 6.3 closes more than 120 issues while advancing compatibility with Microsoft's latest SDKs, runtimes, and development environments.
.NET 10 Preview Support
The release adds support for .NET 10 Release Candidate 1 in addition to the stable .NET 9 runtime, allowing developers to test against Microsoft's upcoming SDK and runtime while maintaining production stability on .NET 9. As noted, the company detailed its .NET 10 RC2 work after the v6.3 announcement on Oct. 9. Uno emphasized that .NET 10 support is still in preview and intended for testing only. Migration guides are available for upgrading from .NET 9 to .NET 10 and earlier versions.
Visual Studio 2026 Ready
Uno Platform 6.3 introduces full support for Microsoft's forthcoming Visual Studio 2026, including the new human-readable .slnx solution format. The Uno Platform extension has been updated for seamless operation in both Visual Studio 2026 and 2022, allowing side-by-side compatibility for teams adopting the new IDE gradually. The company said the updated project system ensures all Uno Platform features continue to work as expected. Updated extensions are also available for JetBrains Rider and Visual Studio Code.
WebAssembly Breakthrough
In this release, WebAssembly rendering performance improves through a change that moves image decoding off the main UI thread and into WebWorkers. This architectural shift allows images to decode in parallel, resulting in smoother scrolling for media galleries and dashboards. According to the company, the update eliminates the stuttering and freezes that could previously affect image-heavy applications, particularly line-of-business dashboards or consumer apps built with WebAssembly targets.
TabView Refined
TabView gains new reliability and customization features designed for enterprise and data-centric applications. Uno said developers can now define non-closable tabs for key views, apply new tab sizing modes (equal, compact, or size-to-content), and reorder tabs both at design time and runtime. Improvements to rendering consistency, drag-and-drop behavior, and selection reliability make the control more dependable for complex layouts such as dashboards and multi-document interfaces.
Hot Design Productivity
Hot Design, Uno Platform's visual designer included with Uno Platform Studio, continues to evolve toward faster design-time iteration. Version 6.3 adds search functionality to the elements tree, letting developers quickly locate controls within complex hierarchies, along with the ability to toggle visibility to reduce on-screen clutter during design. These changes build on Hot Design's mission to modernize XAML-based design workflows for cross-platform .NET developers.
About the Author
David Ramel is an editor and writer at Converge 360.