Sort string array by comparing substring in CSharp

     // w w  w. j  a v a2  s  .  c  o m
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;


public class MainClass{

   public static void Main(string[] args){   
         String[] TestData = {"One", "Two", "Three", "Four",
                              "Five", "Six", "Seven", "Eight", 
                              "Nine", "Ten"};

         var ThisQuery = TestData.OrderByDescending(ThisKey => ThisKey.Length).
            ThenBy(ThisKey => ThisKey.Substring(0, 1));

         foreach (var ThisElement in ThisQuery)
            Console.WriteLine(ThisElement);


   }
}