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[ObservesProperty]

Apply next to [DelegateCommand] or [AsyncDelegateCommand]. When any listed property changes, the generator wires logic so CanExecute is re-evaluated (mirrors Prism’s ObservesProperty behaviour).

[ObservableProperty]
private bool _isValid;

[DelegateCommand(CanExecute = nameof(CanSubmit))]
[ObservesProperty(nameof(IsValid))]
private void Submit() { }

Multiple properties: [ObservesProperty(nameof(A), nameof(B))] or repeat the attribute. Unknown property names → PSG2004.

Related

• DelegateCommand
• AsyncDelegateCommand