using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var someNumbers = new [] { 4, 3, 2, 1 };

        var processed = someNumbers.Select(n => n * 2)

                                   .Where(n => n != 6)

                                   .OrderBy(n => n);

        foreach(var number in processed)

        {

            Console.WriteLine(number);

        }

    }

}