Sort the string names without using any methods in C#?

using System;

using System.Linq;

namespace SortingArray

{

    class Program

    {

        static void Main(string[] args)

        {

            string[] arr = new string[] { "horse", "flag", "apple", "space", "balloon" };

            var sortArray = from str in arr

                       orderby str

                       select str;

            foreach (string item in sortArray)

            {

                Console.WriteLine(item);

            }

            Console.ReadKey();

        }

    }

}