How can I raise a CollectionChanged event on an ObservableCollection, and pass it the changed items?

I've been looking into it and apparently the CollectionChanged method cannot be raised with multiple items.

So I can call

OnCollectionChanged(new NotifyCollectionChangedEventArgs(    NotifyCollectionChangedAction.Add, singleItem));

but I can't call

OnCollectionChanged(new NotifyCollectionChangedEventArgs(    NotifyCollectionChangedAction.Add, listOfItems));

For now what I have done is simply raise the Add event for every item added, but I am still rather unhappy at this since it means I raise the CollectionChanged event for every item in the AddRange method instead of only once.

public void AddRange(IEnumerable<T> collection){    foreach (var i in collection)     {        Items.Add(i);        OnCollectionChanged(new NotifyCollectionChangedEventArgs(            NotifyCollectionChangedAction.Add, i));    }}

This works fine for me "stand-alone". Meaning I'm not using an ObservableCollection for data binding. So it's not an ObservableCollection issue but rather a ListCollectionView limitation.

Please read the following article, it's a very interesting read:

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