Passing list<int> by ref. Speed test

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace test
{
    class Program
    {
        static void Main(string[] args)
        {
            Random random = new Random();

            List<int> listTest = new List<int>();

            for (int i = 0; i < 500000; i++)
            {
                listTest.Add(random.Next(1001));
            }

            Stopwatch sw2 = new Stopwatch();
            sw2.Start();
            Method1(listTest);
            sw2.Stop();
            Console.WriteLine("Elapsed={0}", sw2.Elapsed);


            Stopwatch sw = new Stopwatch();
            sw.Start();
            Method2(ref listTest);
            sw.Stop();
            Console.WriteLine("ref - Elapsed={0}", sw.Elapsed);

            Console.ReadLine();
        }

        static int Method1(List<int> listTest)
        {
            return listTest[listTest.Count / 2];
        }

        static int Method2(ref List<int> listTest)
        {
            return listTest[listTest.Count / 2];
        }

        /*
           [+] -> faster

           Results:

           ref - Elapsed=00:00:00.0001414 +
           Elapsed=00:00:00.0002133

           ref - Elapsed=00:00:00.0001943 +
           Elapsed=00:00:00.0004715

           ref - Elapsed=00:00:00.0001965 +
           Elapsed=00:00:00.0002490

           ref - Elapsed=00:00:00.0002220
           Elapsed=00:00:00.0001969 +

           ref - Elapsed=00:00:00.0002064
           Elapsed=00:00:00.0001320 +

           ref - Elapsed=00:00:00.0001630
           Elapsed=00:00:00.0001509 +

           ref - Elapsed=00:00:00.0002603
           Elapsed=00:00:00.0001659 +

           ref - Elapsed=00:00:00.0001739
           Elapsed=00:00:00.0001403 +

           Elapsed=00:00:00.0002337
           ref - Elapsed=00:00:00.0001436 +

           Elapsed=00:00:00.0001655
           ref - Elapsed=00:00:00.0001382 +

           Elapsed=00:00:00.0001739 +
           ref - Elapsed=00:00:00.0025709

           Elapsed=00:00:00.0003128
           ref - Elapsed=00:00:00.0001524 +

           Elapsed=00:00:00.0001659
           ref - Elapsed=00:00:00.0001487 +

         */

    }
}