static void Main(string[] args)
{
Dequeue<string> queue = new Dequeue<string>();
queue.AddToEnd("one");
queue.AddToEnd("two");
queue.AddToEnd("three");
queue.AddToFront("zero");
Console.WriteLine(queue.PeekFromFront());
Console.WriteLine(queue.PeekFromEnd());
if (queue.Contains("one"))
{
Console.WriteLine(true);
}
}
