// Add first element
public void AddLast(DoubleLink <T> link)
{
Debug.Assert(link != null);
if (link.IsLinked)
{
link.Unlink();
}
link.LinkAfter(Last);
}
// Add last element
public void AddFirst(DoubleLink <T> link)
{
Debug.Assert(link != null);
if (link.IsLinked)
{
link.Unlink();
}
link.LinkBefore(First);
}
// Unlink @link from the list
public void Unlink(DoubleLink <T> link)
{
Debug.Assert(link != null);
link.Unlink();
}
