protected override void SetItem(int index, T item)
{
EventHandler <SetChangedEventArgs <T> > handler = OnSetChanged;
if (handler == null)
{
base.SetItem(index, item);
}
else
{
handler(this, SetChangedEventArgs <T> .Removed(base[index], index));
base.SetItem(index, item);
handler(this, SetChangedEventArgs <T> .Added(item, index));
}
}
RemoveItem(int index)
{
EventHandler <SetChangedEventArgs <T> > handler = OnSetChanged;
if (handler == null)
{
base.RemoveItem(index);
}
else
{
handler(this, SetChangedEventArgs <T> .Removed(base[index], index));
base.RemoveItem(index);
for (int i = index; i < Count; i++)
{
handler(this, SetChangedEventArgs <T> .Moved(base[i], i + 1, i));
}
}
}
protected override void InsertItem(int index, T item)
{
EventHandler <SetChangedEventArgs <T> > handler = OnSetChanged;
if (handler == null)
{
base.InsertItem(index, item);
}
else
{
base.InsertItem(index, item);
handler(this, SetChangedEventArgs <T> .Added(item, index));
for (int i = index + 1; i < base.Count; i++)
{
handler(this, SetChangedEventArgs <T> .Moved(base[i], i - 1, i));
}
}
}