WPFDevelopers is a large WPF UI component library for .NET desktop applications, distributed as the `WPFDevelopers` NuGet package. The core deliverable is a collection of 80+ custom controls spanning input (NumericBox, OtpBox, IPEditBox, ColorPicker, DateRangePicker, MultiSelectComboBox), feedback (Toast, WDMessageBox, Badge, CountdownTimer), navigation (CircleMenu, DrawerMenu, NavScrollPanel, Step), data display (ChartBar/Line/Pie/Radar, Pagination, Segmented, Thermometer, Dial, Gauge), and specialized widgets (MapView, MarkdownViewer, ScreenCut, SvgViewer, NotifyIcon, GestureUnlock, VerifyCode). The architecture follows a consistent templated-control pattern: every control defines DependencyProperties, [TemplatePart] contracts, and routed events, with per-control theme XAML resource dictionaries under src/WPFDevelopers.Shared/Themes. A ThemeManager/Resources singleton provides light/dark theming with animated color transitions, custom radius, and system-theme following. The solution targets legacy .NET 4.0 and 4.5x via shared projects, with CI builds running on a .NET 10 SDK — a deliberate but costly compatibility strategy spanning 18 framework versions.