asc

class NotifiableCollection<T> : Collection<T>, INotifyCollectionChanged
{
    public NotifiableCollection() { }

    protected override void InsertItem(int index, T item)
    {
        base.InsertItem(index, item);
        OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, item));
    }

    protected override void RemoveItem(int index)
    {
        T item = base[index];
        base.RemoveItem(index);
        OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Remove, item));
    }

    protected override void ClearItems()
    {
        base.ClearItems();
        OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
    }

    public void Move(int oldIndex, int newIndex)
    {
        T item = base[oldIndex];
        base.SetItem(newIndex, item);
        OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Move,
            item, newIndex, oldIndex));
    }
    protected override void SetItem(int index, T item)
    {
        T oldValue = base[index];
        base.SetItem(index, item);

        OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Replace,
                item, oldValue));
    }