public void RemoveRange(List <object> items)
{
CollectionChanged -= ThisCollectionChanged;
foreach (T item in items)
{
Remove(item);
item.PropertyChanged -= ItemPropertyChanged;
DetachAnyCollectionChangedToDetailsItem(item);
RemoveItems.Add(item);
}
CollectionChanged += ThisCollectionChanged;
OnAnyCollectionChanged();
}
private void ThisCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
if (e.Action == NotifyCollectionChangedAction.Add && e.NewItems != null)
{
foreach (T newItem in e.NewItems)
{
newItem.PropertyChanged += ItemPropertyChanged;
AttachAnyCollectionChangedToDetailsItem(newItem);
AddItems.Add(newItem);
}
}
else if (e.Action == NotifyCollectionChangedAction.Remove && e.OldItems != null)
{
foreach (T oldItem in e.OldItems)
{
oldItem.PropertyChanged -= ItemPropertyChanged;
DetachAnyCollectionChangedToDetailsItem(oldItem);
RemoveItems.Add(oldItem);
}
}
OnAnyCollectionChanged();
}