public void Have_Ability_To_Add_To_Head_Or_Tail_Node() { LinkedList<int> list = new LinkedList<int>(); Node<int> headNode = new Node<int>(100); Node<int> tailNode = new Node<int>(200); list.AddToHead(headNode); list.AddToTail(tailNode); Assert.AreSame(headNode, list.Head); Assert.AreSame(tailNode, list.Tail); }