System.Windows.Data.DataList.RaiseCollectionChanged C# (CSharp) Method

        private void RaiseCollectionChanged(NotifyCollectionChangedAction action, object item, int index)
        {
            if (_collectionChangedHandler != null) {
                NotifyCollectionChangedEventArgs e = new NotifyCollectionChangedEventArgs(action, item, index);
                _collectionChangedHandler(this, e);
            }
        }