ResXLocalization.WPF 1.0.0

ResXLocalization

Type-safe .resx localization for Avalonia and WPF - switch language live, write zero csproj boilerplate.

ResXLocalization takes the .resx files you already know and adds:

• ⚡ Live, no-reload language switching - set one property and every bound string updates in place.
• 🔒 Type-safe, compile-checked keys - a Roslyn source generator turns every .resx into strongly-typed keys, so a renamed or deleted resource becomes a compile error, not a runtime surprise.
• 🗂️ First-class multiple .resx support - look up by typed key, scope to one file, or search across all registered files.
• 🔤 Enum localization built in - localize enum members by convention.
• 🧮 Format arguments - Get(key, args…) formats in the active culture.
• 🩺 Missing-translation diagnostics - a visible, configurable !key! sentinel plus a TranslationNotFound event.
• 🌐 Language-picker ready - GetAvailableCultures() discovers the cultures your app actually ships.
• 🚀 Native AOT & trim clean (Avalonia package) - zero IL2026/IL3050, no reflection over your resources.
• 📦 One package, zero csproj boilerplate - runtime engine, source generator, and MSBuild wiring ship together.

Normal .NET parent/neutral resource fallback applies. TranslationNotFound is raised only when a key is unresolved across the complete fallback chain, not when a satellite entry falls back successfully.

Typed keys are generated for string entries in dot-free neutral .resx files that have a same-folder classic .Designer.cs accessor. Satellite files, non-string entries, files without that designer, and SDK GenerateResxSource accessors are not eligible.

Malformed eligible files produce the RXLGEN001 build diagnostic. Accessor namespaces and types are read from C# syntax, including file-scoped/global namespaces and imported or aliased System.Resources.ResourceManager types.

Quick start

<TextBlock Text="{l:Localize {x:Static res:AppStringsKeys.Greeting}}" />

// Register your resources once at startup …
Localizer.Current.RegisterResourceManager(AppStrings.ResourceManager);

// … then switch the whole UI to German - every bound string re-resolves in place, no reload.
Localizer.Current.CurrentCulture = new CultureInfo("de");

The XAML namespace to map:

Avalonia:  xmlns:l="clr-namespace:RentADeveloper.ResXLocalization.Avalonia;assembly=ResXLocalization.Avalonia"
WPF:       xmlns:l="clr-namespace:RentADeveloper.ResXLocalization.WPF;assembly=ResXLocalization.WPF"

Two packages, one engine

Both share the same UI-agnostic engine (ILocalizer / Localizer.Current, ResourceKey), the same source generator, and the same MSBuild wiring.

Documentation

The full documentation - quick start, lookup modes, enum localization, multiple .resx files, Native AOT publishing, troubleshooting, and complete runnable sample apps for both frameworks - lives in the project README; the API reference documents every type.

License

Released under the MIT License. © 2026 David Liebeherr.