// Behaviors
public void Add(Type data)
{
LinkedListNode <Type> savedTail;
if (head == null)
{
head = new LinkedListNode <Type>(data);
tail = head;
}
else
{
savedTail = tail;
tail = new LinkedListNode <Type>(data);
tail.SetPrev(savedTail);
savedTail.SetNext(tail);
}
}
