public class QcvToObservableCollectionConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value is QueryableCollectionView queryableCollectionView)
            {
                var observableCollection = new ObservableCollection<object>();
                foreach (var item in queryableCollectionView)
                {
                    observableCollection.Add(item);
                }

                queryableCollectionView.CollectionChanged += (sender, e) =>
                {
                    if (e.Action == NotifyCollectionChangedAction.Add)
                    {
                        foreach (var newItem in e.NewItems)
                        {
                            observableCollection.Add(newItem);
                        }
                    }
                    else if (e.Action == NotifyCollectionChangedAction.Remove)
                    {
                        foreach (var oldItem in e.OldItems)
                        {
                            observableCollection.Remove(oldItem);
                        }
                    }
                    else if (e.Action == NotifyCollectionChangedAction.Reset)
                    {
                        observableCollection.Clear();
                        foreach (var item in queryableCollectionView)
                        {
                            observableCollection.Add(item);
                        }
                    }
                };

                return observableCollection;
            }
            return null;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }