// ObserveCollectionChanged ==============================
/// <example><code>
/// modelList
/// .ObserveCollectionChanged()
/// .Subscribe(e => Console.WriteLine($"CollectionChangedEvent({e.EventArgs.Action}) occurred."));
/// </code></example>
public static IObservable <EventPattern <NotifyCollectionChangedEventArgs> > ObserveCollectionChanged(this INotifyCollectionChanged source)
{
return(source.ObserveEvent <NotifyCollectionChangedEventArgs>(nameof(source.CollectionChanged)));
}
