static void Main()
{
var list = new DoublyLinkedListExpanded <int>();
list.ForEach(Console.WriteLine);
Console.WriteLine("--------------------");
list.AddLast(5);
list.AddFirst(3);
list.AddFirst(2);
list.AddLast(10);
Console.WriteLine("Count = {0}", list.Count);
list.ForEach(Console.WriteLine);
Console.WriteLine("--------------------");
list.RemoveFirst();
list.RemoveLast();
list.RemoveFirst();
list.ForEach(Console.WriteLine);
Console.WriteLine("--------------------");
list.RemoveLast();
list.ForEach(Console.WriteLine);
Console.WriteLine("--------------------");
Console.WriteLine("2---------2--------2");
list.AddLast(1);
list.AddLast(2);
list.AddLast(3);
list.ForEach(Console.WriteLine);
Console.WriteLine("--------------------");
list[0] = 5;
list[1] = 6;
list[2] = 7;
list.AddLast(8);
list.AddLast(9);
list.AddLast(10);
list.ForEach(Console.WriteLine);
Console.WriteLine("--------------------");
list.InsertAt(20, 3);
list.ForEach(Console.WriteLine);
Console.WriteLine("3---------3--------3");
Console.WriteLine(list.RemoveAt(4));
Console.WriteLine("--------------------");
list.ForEach(Console.WriteLine);
Console.WriteLine("4---------4--------4");
list.Clear();
Console.WriteLine("--------------------");
list.AddLast(8);
list.AddLast(9);
list.AddLast(10);
}