static void Main(string[] args) { DoublyLinkedList <int> list = new DoublyLinkedList <int>(); //for (int i = 0; i < 20; i++) //{ // list.addlast(i); //} list.addfirst(3); list.addfirst(2); list.addfirst(1); list.addlast(4); list.addlast(6); list.addindex(4, 5); list.addindex(0, 100); list.removeindex(2); list.Displaylist(); list.Displaylistback(); Console.ReadKey(); }