private static void Main(string[] args)
{
var list = new LinkList();
list.AddItem(8);
list.AddItem(6);
list.AddItem(4);
list.AddItem(2);
list.InsertInOrder(5);
Console.WriteLine("List items: {0}", list.DisplayItems());
Console.WriteLine("List length: {0}", list.NumberOfItems());
Console.ReadKey();
}