using System;

using System.Collections.Generic;

using System.Linq;

​

namespace ConsoleApp2

{

    class Program

    {

        static void Main(string[] args)

        {

            var random = new Random();

            IEnumerable<int> GetEnumerable(int count) => Enumerable.Range(1, count).Select(i => random.Next(100)).ToList();

​

            var input = new[] { GetEnumerable(5), GetEnumerable(5), GetEnumerable(5), GetEnumerable(5) };

​

            var output1 = input.SelectMany(x => x).OrderBy(x => x);

            var output2 = input.SelectMany(x => x.OrderBy(x => x));

​

            Console.WriteLine(string.Join(" ", output1));

            Console.WriteLine(string.Join(" ", output2));

​

            Console.ReadKey();

        }

    }

}

​