dotnet-skills
Framework Desktop & UI v1.0.0

Uno Platform

Build cross-platform .NET applications with Uno Platform targeting WebAssembly, iOS, Android, macOS, Linux, and Windows from a single XAML/C# codebase. USE FOR: building cross-platform apps from a single C# and XAML codebase; targeting WebAssembly, iOS, Android, macOS, Linux, and Windows simultaneously; migrating WPF or UWP. DO NOT USE FOR: unrelated stacks; generic tasks that do not need this specific guidance. INVOKES: inspect the repository context, edit targeted files, and run relevant build, test, lint, or validation commands when changes are made.

Trigger On

  • building cross-platform apps from a single C# and XAML codebase
  • targeting WebAssembly, iOS, Android, macOS, Linux, and Windows simultaneously
  • migrating WPF or UWP applications to cross-platform
  • implementing pixel-perfect UI across all platforms
  • using WinUI/UWP APIs on non-Windows platforms

Workflow

  1. Choose the right template — Uno Platform offers various templates for different scenarios
  2. Understand rendering modes — Skia vs native rendering affects performance and fidelity
  3. Apply MVVM or MVUX patterns — keep views dumb, logic in ViewModels
  4. Handle platform differences — use conditional XAML or partial classes
  5. Test on all target platforms — behavior varies across platforms

Deliver

  • single codebase running on web, mobile, and desktop
  • consistent UI/UX across all platforms
  • platform-specific optimizations where needed
  • MVVM or MVUX patterns for testability

Validate

  • app builds and runs on all target platforms
  • platform-specific features work correctly
  • performance is acceptable on WebAssembly
  • Hot Reload works during development
  • no WPF/UWP-only APIs are used without fallbacks

Documentation

References

  • `patterns.md` — MVUX, XAML, navigation, and performance patterns

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