public static void Main(string[] args)
{
Link link = new Link();
link.AddLast("one");
Console.WriteLine(link.Head.Name == "one");
Console.WriteLine(link.Tail.Name == "one");
Console.WriteLine(link.Head.Prev == null);
Console.WriteLine(link.Head.Next == null);
link.AddLast("two");
Console.WriteLine(link.Head.Name == "one");
Console.WriteLine(link.Tail.Name == "two");
Console.WriteLine(link.Head.Prev.Name == "two");
Console.WriteLine(link.Head.Next.Name == "two");
Console.WriteLine(link.Tail.Prev.Name == "one");
Console.WriteLine(link.Tail.Next.Name == "one");
link.AddFirst("zero");
Console.WriteLine(link.Head.Name == "zero");
Console.WriteLine(link.Tail.Name == "two");
Console.WriteLine(link.Head.Prev.Name == "two");
Console.WriteLine(link.Head.Next.Name == "one");
Console.WriteLine(link.Tail.Prev.Name == "one");
Console.WriteLine(link.Tail.Next.Name == "zero");
link.AddLast("three");
Console.WriteLine(link.Head.Name == "zero");
Console.WriteLine(link.Tail.Name == "three");
Console.WriteLine(link.Head.Prev.Name == "three");
Console.WriteLine(link.Head.Next.Name == "one");
Console.WriteLine(link.Tail.Prev.Name == "two");
Console.WriteLine(link.Tail.Next.Name == "zero");
// Check Current
Console.WriteLine(link.Head.Next.Name == "one");
Console.WriteLine(link.Tail.Next.Name == "zero");
Console.WriteLine(link.Head.Prev.Prev.Name == "two");
Console.WriteLine(link.Head.Next.Next.Name == "two");
Console.WriteLine(link.Tail.Prev.Prev.Name == "one");
Console.WriteLine(link.Tail.Next.Next.Name == "one");
Console.WriteLine(link.Head.Next.Next.Next.Name == "three");
link.RemoveFirst();
Console.WriteLine(link.Head.Name == "one");
Console.WriteLine(link.Tail.Name == "three");
Console.WriteLine(link.Head.Prev.Name == "three");
Console.WriteLine(link.Head.Next.Name == "two");
Console.WriteLine(link.Tail.Prev.Name == "two");
Console.WriteLine(link.Tail.Next.Name == "one");
link.AddFirst("zero");
link.RemoveLast();
Console.WriteLine(link.Head.Name == "zero");
Console.WriteLine(link.Tail.Name == "two");
Console.WriteLine(link.Head.Prev.Name == "two");
Console.WriteLine(link.Head.Next.Name == "one");
Console.WriteLine(link.Tail.Prev.Name == "one");
Console.WriteLine(link.Tail.Next.Name == "zero");
Console.WriteLine(link.Tail.Next.Next.Name == "one");
Console.WriteLine(link.Head.Prev.Prev.Name == "one");
Console.WriteLine("Count : " + link.Count());
} // emm
