public void Exercise1Item2() { var list = new DoubleLinkedList <int>( new Node <int>(1), new Node <int>(2)); list.SetTail(3); list.SetTail(4); list.SetTail(5); list.AddAfterValue(4, 10); var nodeValue4 = list.SearchFirstOne(4); Assert.Equal(10, nodeValue4.Next.Value); }