Why Doesn't My ObservableCollection Reflect Changes in Its Item Properties?

Solving the ObservableCollection Update Mystery

Your ObservableCollection isn't reflecting changes in its EntityViewModel items because, while EntityViewModel raises PropertyChanged events, the ObservableCollection only detects changes to itself, not its contained objects.

The solution? Implement a TrulyObservableCollection. This custom class extends the standard ObservableCollection to solve this limitation:

1. INotifyPropertyChanged Enforcement: It ensures all added items implement INotifyPropertyChanged, guaranteeing they can send change notifications.
2. Smart Event Handling: It listens for CollectionChanged events and subscribes to the PropertyChanged events of newly added items. Crucially, it unsubscribes from removed items to prevent memory leaks.
3. Collection Reset: When an item's property changes, the TrulyObservableCollection raises a Reset event, triggering a complete UI refresh of all bound controls.

By switching to TrulyObservableCollection, changes to your EntityViewModel properties will automatically update your UI bindings.

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