dotnet-winui

Guide WinUI 3 desktop app development with the Windows App SDK.

1|Updated Feb 22, 2026

Search Tags:#desktop development #.net #mvvm #xaml #winui #windows app sdk

Ready to run

npx skills add https://github.com/rudironsoni/dotnet-agent-harness --skill dotnet-winui-rudironsoni

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: dotnet-winui
Source: https://github.com/rudironsoni/dotnet-agent-harness/tree/main/.rulesync/skills/dotnet-winui
Command: npx skills add https://github.com/rudironsoni/dotnet-agent-harness --skill dotnet-winui-rudironsoni

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill provides guidance and patterns for developing modern desktop applications using WinUI 3 and the Windows App SDK, simplifying complex UI development and deployment.

Core Features & Use Cases

Project Setup: Configure WinUI 3 projects with the latest .NET and Windows App SDK versions.
XAML Patterns: Implement efficient UI development using compiled bindings (x:Bind) and deferred loading (x:Load).
MVVM Architecture: Utilize CommunityToolkit.Mvvm for robust data binding and command handling.
Deployment Options: Understand and implement both MSIX packaged and unpackaged deployment modes.
Windows Integration: Leverage WinUI 3's capabilities for notifications, widgets, and lifecycle management.
Use Case: You need to build a new desktop application for Windows that uses modern UI elements, follows MVVM principles, and can be easily deployed to users.

Quick Start

Use the dotnet-winui skill to create a new WinUI 3 project with the Windows App SDK.

Frequently Asked Questions about dotnet-winui

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

FAQPage Schema

How does x:Bind and x:Load work in WinUI 3 XAML patterns?▼

WinUI 3 uses compiled bindings (`x:Bind`) for efficient data binding and `x:Load` for deferred loading to optimize UI performance. These XAML patterns streamline element rendering within your Windows desktop application.

What are the differences between MSIX packaged and unpackaged deployment for Windows App SDK apps?▼

MSIX packaged deployment offers integrated installation and trust for Windows App SDK apps, while unpackaged deployment provides flexible distribution without strict packaging formats. WinUI 3 supports both modes for different deployment needs.

How do I use x:Bind and x:Load for XAML patterns in WinUI 3?▼

Do I need .NET 8.0 to build Windows desktop apps with WinUI 3?▼

Yes, WinUI 3 desktop development with the Windows App SDK targets .NET 8.0 or later versions. This ensures compatibility with the latest Windows App SDK 1.6+ features and modern .NET performance improvements.

What is the best way to deploy a WinUI 3 unpackaged application?▼

The best way to deploy an unpackaged WinUI 3 application is configuring the Windows App SDK for unpackaged execution. This mode provides flexible distribution without MSIX packaging constraints while retaining modern desktop capabilities.