using System;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        double[] doubles = { 1.7, 2.3, 1.9, 4.1, 2.9 }; 

        var sortedDoubles = doubles.OrderBy(n => n);

        var doublesArray = sortedDoubles.ToArray(); 

        Console.WriteLine("Every other double from highest to lowest:"); 

        for (int d = 0; d < doublesArray.Length; d += 2) 

        { 

            Console.WriteLine(doublesArray[d]); 

        }   

    }

}