winui3-csharp-app

Develop, refactor, and troubleshoot WinUI 3 desktop apps in C# and XAML.

1|1|Updated Mar 7, 2026

Search Tags:#csharp #desktop app #mvvm #xaml #winui3 #windows app sdk

Ready to run

npx skills add https://github.com/itsmichaelwest/agent-kit --skill winui3-csharp-app-itsmichaelwest

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: winui3-csharp-app
Source: https://github.com/itsmichaelwest/agent-kit/tree/main/skills/winui3-csharp-app
Command: npx skills add https://github.com/itsmichaelwest/agent-kit --skill winui3-csharp-app-itsmichaelwest

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill provides comprehensive guidance and best practices for developing, refactoring, and troubleshooting desktop applications using WinUI 3 and the Windows App SDK in C# and XAML.

Core Features & Use Cases

Application Development: Guides through project setup, architecture choices (MVVM), and UI implementation with WinUI controls.
Refactoring & Optimization: Offers strategies for improving code quality, threading, and performance.
Troubleshooting: Provides solutions for common issues related to navigation, windowing, and UI responsiveness.
Use Case: You need to build a new desktop application for Windows using the latest Microsoft technologies. This Skill will walk you through setting up your project, choosing an architecture, and implementing core features like navigation and data binding.

Quick Start

Follow the Quick Start (New) guide to begin building a new WinUI 3 application.

Frequently Asked Questions about winui3-csharp-app

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

FAQPage Schema

How do I set up a WinUI 3 desktop application project in C#?▼

WinUI 3 uses the MVVM architecture pattern to separate UI logic from business logic in C# desktop apps. This Skill provides guidance on implementing data binding, navigation, and windowing within the MVVM framework for Windows App SDK applications.

What's the best way to implement navigation and windowing in a Windows App SDK app?▼

System backdrops in WinUI 3 apply native Windows design principles like Mica and Acrylic materials to your desktop application windows. This Skill explains how to configure and optimize these system backdrops within the Windows App SDK.

Can I use this to refactor and optimize an existing WinUI 3 application?▼

You can refactor and optimize an existing WinUI 3 application by applying strategies for code quality improvement, threading, and performance optimization. This Skill offers specific troubleshooting solutions for UI responsiveness and architectural refactoring.

Why does my WinUI 3 desktop app have UI responsiveness issues?▼

WinUI 3 desktop apps experience UI responsiveness issues due to improper threading and unoptimized XAML rendering. This Skill provides performance optimization strategies and troubleshooting techniques to resolve these common Windows App SDK problems.