private static void Main()
{
var doublyLinkedList = new DoublyLinkedList();
doublyLinkedList.Add(5);
doublyLinkedList.Add(10);
doublyLinkedList.Add(15);
Console.WriteLine(doublyLinkedList.Contains(10));
Console.WriteLine(doublyLinkedList.Contains(25));
Console.WriteLine(doublyLinkedList.Remove(10));
Console.WriteLine(doublyLinkedList.FindByIndex(1));
Console.WriteLine(doublyLinkedList.Count);
Console.WriteLine(doublyLinkedList[1]);
doublyLinkedList[1] = 20;
Console.WriteLine(doublyLinkedList[1]);
doublyLinkedList.Clear();
doublyLinkedList.Add(1);
doublyLinkedList.Add(3);
Console.WriteLine("Insert after: " + doublyLinkedList.InsertBefore(1, 2));
Console.Read();
}
