using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        string[] items = { "_a", "A", "a" };

        Console.WriteLine(string.Format("Ascending Order: {0}", string.Join(",", items.OrderBy(f=>f))));

        Console.WriteLine(string.Format("Descending Order: {0}", string.Join(",", items.OrderByDescending(f=>f))));

    }

}