MahApps.Metro is a mature WPF UI library that provides a comprehensive set of custom controls, styles, themes, and helpers for building modern desktop applications with a Metro/Windows 10/WinUI aesthetic. The library offers over 30 custom controls including HamburgerMenu, ContentDialog, InfoBar, RangeSlider, NumericUpDown, ColorPicker, AutoSuggestBox, SplitView, and a full dialog system with login, input, message, and progress dialogs. It ships with three visual style sets (Metro, Win10, WinUI) and integrates deeply with the ControlzEx theming framework for runtime theme switching. The architecture is a standard .NET library with a large public API surface exposed via dependency properties, attached properties, custom behaviors, converters, and automation peers. The codebase is heavily tested (350+ NUnit tests) with a custom WindowTestFixture for UI integration tests. Sample applications (MahApps.Metro.Gallery, MahApps.Metro.Demo) demonstrate real-world usage, and project templates (dotnet new) provide scaffolding for new apps. The library also includes project templates (MahAppsMetroApp, MahAppsMetroMvvmApp, MahAppsMetroNavApp) and a Visual Studio manifest. Despite its age and large API surface, the library remains actively maintained with recent commits, issue triage, and support for .NET 6-10. Technical drift is moderate: some obsolete code (ClipBorder) and Win32 P/Invoke are present, and the three style sets must be kept in sync. The test suite is comprehensive but pixel-level and resource-key-dependent, making it somewhat brittle. Overall, this is a high-quality, production-tested UI library with strong architectural patterns and reusable components.

This repository provides 40+ icon pack libraries for WPF (and UWP) applications under the MahApps.Metro ecosystem. The core architecture defines base classes (PackIconControlBase, PackIconDataFactory, converters) that each icon pack extends with auto-generated code: an enum of icon identifiers (e.g., PackIconFontAwesome6Kind), a PackIcon control, markup extensions, and converters. Icon path data is embedded as JSON resources and loaded via a singleton factory. The code is predominantly auto-generated from upstream icon sets (Font Awesome, Material Design, Bootstrap, etc.), leading to a highly repetitive structure across packs. The library is actively maintained with recent commits, CI/CD pipelines, and semantic versioning. While the code is well-organized and functional, the heavy reliance on code generation reduces craftsmanship in the per-pack files; the genuinely reusable components are the base classes in the Core project, which implement icon scaling, flip, rotation, spin animation, and data loading patterns.