Individual skill

maui-data-binding

Guidance for .NET MAUI XAML and C# data bindings — compiled bindings, INotifyPropertyChanged / ObservableObject, value converters, binding modes, multi-binding, relative bindings, fallbacks, and MVVM best practices. USE FOR: setting up compiled bindings with x:DataType, implementing INotifyPropertyChanged or CommunityToolkit ObservableObject, creating IValueConverter / IMultiValueConverter, choosing binding modes, configuring BindingContext, relative bindings, binding fallbacks, StringFormat, code-behind SetBinding with lambdas, and enforcing XC0022/XC0025 warnings. DO NOT USE FOR: CollectionView item templates and layouts (use maui-collectionview), Shell navigation data passing (use maui-shell-navigation), dependency injection (use maui-dependency-injection), or animations triggered by property changes (use .NET MAUI animation APIs).

plugins/dotnet-maui/skills/maui-data-binding/SKILL.md

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# .NET MAUI Data Binding

Wire UI controls to ViewModel properties with compile-time safety, correct
change notification, and minimal overhead. Prefer compiled bindings everywhere
and treat binding warnings as build errors.

## When to Use

- Adding `x:DataType` compiled bindings to a new or existing page
- Implementing `INotifyPropertyChanged` or CommunityToolkit `ObservableObject`
- Creating or consuming `IValueConverter` / `IMultiValueConverter`
- Choosing the correct `BindingMode` for a control property
- Setting `BindingContext` in XAML or code-behind
- Using relative bindings (`Self`, `AncestorType`, `TemplatedParent`)