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winui-app

Guides building WinUI 3 desktop apps with C# and Windows App SDK.

24.7k|1.7k|Updated Nov 25, 2025
Search Tags:#c##winui#desktop application#windows app sdk#microsoft guidance
One-click install
npx skills add https://github.com/openai/skills --skill winui-app-openai
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: winui-app
Source: https://github.com/openai/skills/tree/main/skills/.curated/winui-app
Command: npx skills add https://github.com/openai/skills --skill winui-app-openai

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires Microsoft.Windows.Developer, Microsoft.WinGet.DSC, Microsoft.VisualStudio.DSC, Microsoft.VisualStudio.Product.Community, Microsoft.VisualStudio.Workload.ManagedDesktop, Microsoft.VisualStudio.Workload.Universal, Microsoft.VisualStudio.ComponentGroup.WindowsAppSDK.Cs, and includes scripts (resource) and references (resource) and assets (resource) components.

What problem does it solve?

This Skill provides guidance and resources to build modern WinUI 3 desktop applications with C#, using Microsoft's official guidance and community toolkit components.

Core Features & Use Cases

  • WinUI 3 Development: Offers setup guidance, app bootstrap, UX decisions, and implementation patterns for WinUI 3 applications.
  • Environment Setup: Assists with machine readiness checks and prerequisite installations.
  • App Structure: Provides a recommended project structure and guidelines for organizing app components.
  • Styling & Theming: Offers best practices for styling apps with Fluent Design and supporting light and dark mode.
  • Performance & Diagnostics: Includes tips for improving app performance and diagnosing issues.
  • Lifecycle & Notifications: Offers guidance on using Windows App SDK features for app lifecycle and notifications.
  • Use Case: Ideal for developers looking to create modern, high-quality desktop applications with a consistent and responsive user experience.

Quick Start

Use the winui-app skill to bootstrap a new WinUI 3 desktop application.

Frequently Asked Questions about winui-app

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I set up my machine to build WinUI 3 desktop applications with C#?▼

To style WinUI 3 apps with Fluent Design, apply official Microsoft guidance and CommunityToolkit components for consistent theming. This ensures your desktop application properly supports both light and dark mode interfaces.

How do I structure a new WinUI 3 project using the Windows App SDK?▼

Structuring a WinUI 3 project involves following a recommended app structure that organizes components based on Windows App SDK samples and WinUI Gallery patterns. This provides a responsive user experience and maintains official implementation standards.

What is the best way to improve performance and diagnose issues in a WinUI app?▼

Improving performance in a WinUI app requires applying specific tips and diagnostics guidance from the Windows App SDK. This helps developers identify bottlenecks and optimize their modern desktop application for a high-quality user experience.

Can I use CommunityToolkit components with Windows App SDK desktop apps?▼

Yes, you can use CommunityToolkit components with Windows App SDK desktop apps to implement official guidance and patterns. They are explicitly recommended for building modern WinUI 3 applications with C# to enhance UI and functionality.

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