public void Insert(int index, T item)
{
if (index <= _list.Count)
{
_list.Insert(index, item);
}
else if (index - _list.Count <= SecondaryList.Count)
{
SecondaryList.Insert(index - _list.Count, item);
}
else
{
throw new ArgumentOutOfRangeException("index", "Index is out of range");
}
}
public bool Remove(T item)
{
return(_list.Remove(item) || SecondaryList.Remove(item));
}
public void Clear()
{
_list.Clear();
SecondaryList.Clear();
}
