// Add first element
public void AddLast(DoubleLink <T> link)
{
Debug.Assert(link != null);
if (link.IsLinked)
{
link.Unlink();
}
link.LinkAfter(Last);
}
// Adds this element to the list, after the specified element
public void LinkAfter(DoubleLink <T> link, DoubleLink <T> after)
{
Debug.Assert(link != null);
Debug.Assert(after != null);
link.LinkAfter(after);
}
