Microsoft Recommitted to WinUI: What Build 2026 Means for Windows Developers
The Windows desktop development ecosystem has undergone several platform transitions over the past two decades. Since the introduction of WPF in 2006, Microsoft has introduced several successive frameworks for building modern native Windows applications, including WinRT XAML, WinJS, UWP (WinUI 2.0), and, most recently, WinUI 3.0.
This evolution has often left .NET developers uncertain about Microsoft's long-term direction, leading some teams to adopt web technologies while others continued investing in proven Win32-based frameworks like Windows Forms and WPF, both of which remain fully supported today.
Build 2026 may represent a turning point. Through continued investments in WinUI, the Windows App SDK, modern tooling, and AI-powered development experiences, Microsoft delivered one of its strongest signals yet that native Windows development remains a strategic priority. For developers building business applications and enterprise software, the message was clear: WinUI is Microsoft's preferred platform for the future of Windows applications.
In this article, we'll explore the most important WinUI highlights and announcements from Build 2026 and what they mean for developers today, including:
- Microsoft's Message at Build 2026: Native Windows Apps Matter
- New WinUI Development Experiences in 2026
- ComponentOne 2026 v1 Brings New UI to WinUI
- Why Now is a Good Time to Invest in WinUI
Ready to try it out? Download ComponentOne Today!
Microsoft's Message at Build 2026: Native Windows Apps Matter
At Build 2026, Microsoft reaffirmed its commitment to native Windows development. WinUI was positioned as the primary framework for modern Windows applications, with the company emphasizing continued investment in performance, tooling, and platform integration rather than introducing yet another UI framework.
For developers building business applications, dashboards, and enterprise software, this is an important signal. Native applications continue to offer advantages in performance, user experience, Windows integration, and access to emerging AI capabilities where Microsoft is focusing its future investments.
New WinUI Development Experiences in 2026
Alongside its commitment to the platform, Microsoft is investing in making WinUI easier to adopt and more productive to use. Recent updates have focused on improving performance, reducing memory usage, enhancing developer tooling, and aligning WinUI with Microsoft's broader AI-driven vision for Windows.
While many Build 2026 sessions focused on AI-powered development, they also showcased WinUI as the preferred platform for building modern Windows applications. In the months leading up to Build, Microsoft introduced several new tools and productivity enhancements that further streamline the WinUI development experience. Let's take a closer look at the most significant announcements and what they mean for WinUI developers.
New WinUI Project Templates with .NET CLI
One of the most practical WinUI improvements announced in the lead-up to Build 2026 was the introduction of official WinUI project templates for the .NET CLI (Command Line Interface).
For years, getting started with WinUI development typically required Visual Studio and a collection of specialized project templates installed through the IDE. While this workflow worked well for many developers, it differed significantly from the experience available to ASP.NET Core, MAUI, Blazor, and other modern .NET frameworks, all of which embraced command-line tooling as a first-class development experience.
With the new WinUI templates, developers can now create, build, and run WinUI applications directly from the command line:
dotnet new winui-desktopThis seemingly small addition represents a significant step forward for the WinUI ecosystem, and Build 2026 continued this momentum by highlighting the .NET CLI throughout the sessions.
AI Agents are Here for WinUI Development
Another exciting announcement leading up to Build 2026 was Microsoft's introduction of the WinUI Agent Plugin, a set of AI-powered development skills designed specifically for building native Windows applications with WinUI and the Windows App SDK. Available for tools such as GitHub Copilot and Claude Code, the plugin helps AI agents understand common WinUI development tasks and workflows, enabling them to scaffold projects, generate UI layouts, build and run applications, troubleshoot issues, and iterate on code more effectively.
Read more at Microsoft's dev blog: Introducing WinUI agent plugin for GitHub Copilot and Claude Code - #ifdef Windows.
Developing WinUI Applications in VS Code
The WinApp VS Code extension makes WinUI development more accessible by bringing Windows-specific tooling into the editor that many developers already use. As of May 2026, developers can build, run, debug, package, and sign WinUI applications from within VS Code while using familiar features such as GitHub Copilot, source control, and integrated terminal workflows.
By simplifying tasks like package identity configuration, MSIX packaging, and deployment, the extension reduces friction and brings WinUI closer to the modern development experience developers already use for web, cloud, and cross-platform .NET projects.
Read more at Microsoft dev blog: Announcing the WinApp VS Code Extension — Run, Debug, and Package Windows Apps in VS Code - #ifdef Windows.
Continued Investment in Windows App SDK and WinUI
The Windows App SDK is the foundation of WinUI, providing a broader set of APIs, tools, and runtime components that applications use for window management, app lifecycle, notifications, packaging, deployment, and access to modern Windows features.
While Build 2026 did not introduce a major new Windows App SDK feature, its message was arguably more important: WinUI and the Windows App SDK are Microsoft's platform for the future of Windows development. After years of uncertainty, Build 2026 provided one of the clearest signals yet that Microsoft is committed to evolving the current stack rather than replacing it with yet another framework.
Uno Platform Studio Delivers AI Tools and Designers
Perhaps one of the most interesting demonstrations at Build 2026 came not from Microsoft itself, but from the team behind Uno Platform. During a Build session, Uno showcased Uno Platform Studio 3.0, a browser-based, AI-native development application designed to accelerate the creation of modern .NET applications across Windows, macOS, Linux, iOS, Android, and the web.
By combining AI-assisted development, visual design tools, and cloud-based workflows, Uno Platform Studio aims to streamline the process of building enterprise-level applications while reducing the complexity of setting up and maintaining local development environments.
The app can be used in your browser or on any device and can generate full cross-platform, enterprise apps from simple instructions. Once exported, you bring the code to GitHub or your local IDE.
Additionally, WinUI developers may find the Hot Design tools especially interesting. Microsoft has made it clear over the years that they don't plan to provide a full WYSIWYG designer for WinUI development. The Hot Design feature in Uno Platform Studio essentially fills that gap by providing a full contextual-based design surface to speed up UI development. You can take advantage of this feature even if you're just building a WinUI app without the need for cross-platform scalability.
Learn about how you can seamlessly switch between the Hot Design view and VS Code XAML by checking out the Build 2026 session on demand here: Scale enterprise .NET apps with AI‑assisted cross‑platform workflows.
ComponentOne 2026 v1 Brings New UI to WinUI
We, here at MESCIUS, announced the ComponentOne 2026 v1 release during the week of Build. This release brought major enhancements to WinUI components, along with other improvements across the .NET platform.
New Diagram and Gauge WinUI Components
With the addition of new diagramming and gauge controls, we've expanded the WinUI toolkit to make it even easier to build rich dashboards, interactive data visualizations, and enterprise-level business applications.
ComponentOne FlexDiagram is a complete WinUI 3.0 library for building visual, interactive flowcharts, org charts, and decision trees.
- Create quick bound or unbound diagrams in C# from flat or hierarchical data.
- Customize every detail, including layout direction, node shapes, connectors, line styles, arrows, and overall diagram appearance.
- Load complete diagrams from Mermaid syntax using a simple string or text file.
Visualize progress, KPIs, and performance targets with ComponentOne Gauges for WinUI.
- Get fluent, modern-looking radial and linear gauges
- Customize the gauges with tick marks, labels, and colorful ranges
- Create bound bullet graphs for compact, data-rich dashboards
While Microsoft has also announced plans to bring built-in datagrid and charting controls to WinUI soon, ComponentOne FlexGrid and FlexChart continue to offer mature, full-featured, enterprise-ready solutions for developers building complex business applications today.
Check out every WinUI control available today here: WinUI Controls
Ready to check it out? Download ComponentOne Today!
Why Now is a Good Time to Invest in WinUI
As emphasized, WinUI remains the production-ready platform for building modern native Windows applications. The company is reinforcing its commitment through continued performance improvements, tooling updates, and a clearer product identity. One example of this shift is the move away from referring to the framework as "WinUI 3" and toward simply calling it "WinUI," signaling that Microsoft sees it as the current and ongoing WinUI platform rather than another versioned experiment.
Microsoft is also working to elevate C# as a first-class language for building WinUI user interfaces. Today, most WinUI applications use XAML for UI layout and C# for code-behind and application logic. Looking ahead, Microsoft's goal is to make it easier for developers to build complete WinUI interfaces directly in C#. Early examples of this direction can be seen in experimental efforts such as Reactor, which explores a more code-centric approach to composing WinUI applications.
To see how Reactor works and how these changes fit alongside your XAML-based apps, check out Building WinUI Apps with C# First Patterns and AI Assisted Workflows.
What's Next for WinForms and WPF?
Despite Microsoft's continued investment in WinUI and the Windows App SDK, many organizations still rely on WPF and Windows Forms applications that have served them well for years. These frameworks remain fully supported and power countless line-of-business applications across industries.
WinForms and WPF continue to be actively supported and will receive future enhancements through upcoming .NET releases, including .NET 11. For more information on the planned improvements, see below:
For most teams, the question is not whether to replace existing applications overnight, but whether WinUI should play a role in future modernization efforts. Microsoft also plans to improve the interop between WinForms/WPF and WinUI.
Conclusion
While much of Build 2026 focused on AI-powered development, agents, and next-generation coding experiences, the conference also delivered an important message for Windows developers: WinUI is here to stay.
The conference highlighted a broader ecosystem forming around WinUI and the Windows App SDK. Whether through Microsoft's own investments in AI-assisted development or partner innovations like Uno Platform Studio, developers now have more options than ever for building modern Windows applications and extending them across multiple platforms.
For organizations evaluating their next generation of desktop applications, the WinUI messaging from Build 2026 was encouraging. Combined with continued investments from partners such as MESCIUS, which provides enterprise-ready controls including FlexGrid, FlexChart, gauges, and diagramming components, WinUI offers a mature foundation for building the rich business applications that Windows users expect.
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