Why Doesn't My ObservableCollection Detect Item Property Changes?

Troubleshooting ObservableCollection's Inconsistent Property Change Detection

Your CollectionViewModel class utilizes an ObservableCollection<EntityViewModel> named ContentList. Despite using RaisePropertyChanged("IsRowChecked") within your EntityViewModel to signal changes in the IsRowChecked property, these updates aren't consistently reflected.

Here's a solution to create a truly observable collection that reliably detects changes in its contained objects' properties:

<code class="language-csharp">public sealed class TrulyObservableCollection<T> : ObservableCollection<T>
    where T : INotifyPropertyChanged
{
    // ... implementation details ...
}</code>

This enhanced ObservableCollection ensures all added items implement INotifyPropertyChanged. Upon adding an item, it subscribes to the item's PropertyChanged event. When a property within an item changes, the collection raises a NotifyCollectionChangedEventArgs with NotifyCollectionChangedAction.Replace. This action triggers updates across all bound controls, ensuring consistent UI refresh. (Note: The // ... implementation details ... section would contain the code to handle the subscription and event raising.)

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