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maui-theming

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Guide for theming .NET MAUI apps — light/dark mode via AppThemeBinding, ResourceDictionary theme switching, DynamicResource bindings, system theme detection, and user theme preferences. Use when: "dark mode", "light mode", "theming", "AppThemeBinding", "theme switching", "ResourceDictionary theme", "dynamic resources", "system theme detection", "color scheme", "app theme", "DynamicResource". Do not use for: localization or language switching (see .NET MAUI localization documentation), accessibility visual adjustments (see .NET MAUI accessibility documentation), app icons or splash screens (see .NET MAUI app icons documentation), or Bootstrap-style class theming (see Plugin.Maui.BootstrapTheme NuGet package).

When to use

• Adding light and dark mode support to a .NET MAUI app
• Creating custom branded themes with ResourceDictionary
• Detecting and responding to system theme changes at runtime
• Letting users choose a preferred theme (light, dark, or system default)
• Combining OS-driven theme response with custom color palettes

When not to use

• Localization or language switching — see [.NET MAUI localization docs](https://learn.microsoft.com/dotnet/maui/fundamentals/localization)
• Accessibility-specific visual adjustments — see [.NET MAUI accessibility docs](https://learn.microsoft.com/dotnet/maui/fundamentals/accessibility)
• App icon or splash screen configuration — see [.NET MAUI app icon docs](https://learn.microsoft.com/dotnet/maui/user-interface/images/app-icons)
• Bootstrap-style class theming — see the `Plugin.Maui.BootstrapTheme` NuGet package

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