public override bool RemoveAt(uint index, uint count, IAListTreeObserver <K, T> tob)
{
Debug.Assert(!_isFrozen);
if (tob != null)
{
tob.ItemsRemoved(_list, (int)index, (int)count, this);
}
_list.RemoveRange((int)index, (int)count);
return(IsUndersized);
}
