gistfile1.cs

 public class NodeContent
    {
        public NodeContent(int n)
        {
            this.Contenuto = n;
        }
        public int Contenuto { get; set; }
     }
     class DoubleLinkedListNode
    {
        public DoubleLinkedListNode Next { get; set; }
        public NodeContent Content { get; set; }
        public DoubleLinkedListNode Prev { get; set; }
       

    }
    class DoubleLinkedList
    {
        public DoubleLinkedList(NodeContent n, NodeContent m)
        {
            Head = new DoubleLinkedListNode();
            DoubleLinkedListNode appo = new DoubleLinkedListNode();
            Head.Content = n;
            Head.Next = appo;
            Head.Prev = null;
            appo.Content = m;
            appo.Next = null;
            appo.Prev = Head;
        }
        public void add_Qb(NodeContent n)
        {
            DoubleLinkedListNode newnodo;
            DoubleLinkedListNode temp=new DoubleLinkedListNode();
            temp = Head;
            newnodo=Head.Next;
            while (newnodo.Next != null)
            {
                newnodo = newnodo.Next;
                temp=temp.Next;
            }
            temp=temp.Next;
            newnodo.Next = new DoubleLinkedListNode();
            newnodo.Next.Content = n;
            newnodo.Next.Prev = temp;
            newnodo.Next.Next = null;
            
        }
        public void add_T(NodeContent n)
        {
            DoubleLinkedListNode newnodo = new DoubleLinkedListNode();
            newnodo.Prev = null;
            newnodo.Next = Head;
            newnodo.Content = n;
            Head = newnodo;
            //DoubleLinkedListNode appo = new DoubleLinkedListNode();
            //appo.Next = Head;
            //appo.Content = n;
            //Head.Next = appo;
            //Head.Prev = null;
            //appo.Prev = Head;

        }
        public void print_r()
        {
            DoubleLinkedListNode appo= new DoubleLinkedListNode();
            appo = Head;
            while (appo.Next != null)
                appo = appo.Next;
            while (appo.Prev != null)
            {
                Console.Write(appo.Content.Contenuto + "->");
                appo = appo.Prev;
            }
            Console.WriteLine(appo.Content.Contenuto);
        }
        public void print()
        {
            DoubleLinkedListNode appo = new DoubleLinkedListNode();
            appo = Head;
            while (appo.Next != null)
            {
                Console.Write(appo.Content.Contenuto + "->");
                appo = appo.Next;
            }
            Console.WriteLine(appo.Content.Contenuto);
        }
        private DoubleLinkedListNode Head { get; set; }
    }
    class Program
    {
        static void Main(string[] args)
        {
            LinkedList l = new LinkedList(new NodeContent(1));
            DoubleLinkedList m = new DoubleLinkedList(new NodeContent(1), new NodeContent(2));
            //l.Add_Q(new NodeContent(2));
            //l.Add_Q(new NodeContent(3));
            //l.Add_Q(new NodeContent(4));
            //l.Add_Q(new NodeContent(5));
            //l.print();
            //Console.WriteLine("-----senza aggiunta-----");
            //l.add(new NodeContent(1000), 2);
            //l.print();
            //Console.WriteLine("-----aggiunta in mezzo----");
            //l.cancella(3);
            //l.print();
            //Console.WriteLine("-----cancella-----");
            Console.WriteLine("------multilinkata-----");
            m.add_Qb(new NodeContent(3));
            m.add_Qb(new NodeContent(4));
            m.add_Qb(new NodeContent(5));
            m.print();
            Console.WriteLine("----multilinkata reverse----");
            m.print_r();
            Console.WriteLine("-----Inserimento in testa-----");
            m.add_T(new NodeContent(0));
            m.print();
            m.print_r();
        }
    }