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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, co
Passed 21 of 22 test cases with the skill, and 19 of 22 without it.
2 fixed19 passed either way1 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
The instructions your model reads when the skill loads.
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.
x:DataType compiled bindings to a new or existing pageINotifyPropertyChanged or CommunityToolkit ObservableObjectIValueConverter / IMultiValueConverterBindingMode for a control propertyBindingContext in XAML or code-behindSelf, AncestorType, TemplatedParent)StringFormat, FallbackValue, or TargetNullValueSetBinding and lambdas (.NET 9+)maui-collectionview skillmaui-shell-navigation skillmaui-dependency-injection skillCompiled bindings are 8–20× faster than reflection-based bindings and are
required for NativeAOT / trimming. Enable them with x:DataType.
Set x:DataType only where BindingContext is set:
test cases passed, vs 19 / 22 without
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