Array.Sort(valuesArry);

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication5
{
    class Program
    {
        static void Main(string[] args)
        {
            double[] valuesArry = new double[] { 2.69542810293899, 8.67362626166823, 8.714769350604, 4.76212713707014 };
            Array.Sort(valuesArry);
            for (int i = 0; i < 4;i++ )
            {
                Console.WriteLine("{0}", valuesArry[i]);

            }
            Console.WriteLine("=========================");
            Console.WriteLine("{0}", valuesArry[valuesArry.Length/2]);
            Console.WriteLine("{0}", valuesArry[(valuesArry.Length+1) / 2-1]);
            /*
            2.69542810293899
            4.76212713707014
            8.67362626166823
            8.714769350604
            =========================
            8.67362626166823
            4.76212713707014
            请按任意键继续. . . 
             */
        }
    }
}