using System;
using System.Diagnostics;

namespace CSConsole
{
    public static class Program
    {
        public static void Main(string[] args)
        {
            Stopwatch sw = new Stopwatch();

            int[] array1 = new int[1024 * 1024];
            object[] array2 = new object[array1.Length];
            int[] array3 = new int[array1.Length];
            Random random = new Random();

            for (int index = 0; index < array1.Length; index++)
            {
                array1[index] = random.Next();
            }

            sw.Start();

            for (int loop = 0; loop < 100; loop++)
            {
                for (int index = 0; index < array1.Length; index++)
                {
                    array2[index] = array1[index];
                }
            }

            sw.Stop();
            Console.WriteLine("Boxing: {0}", sw.Elapsed);
            sw.Reset();
            sw.Start();

            for (int loop = 0; loop < 100; loop++)
            {
                for (int index = 0; index < array1.Length; index++)
                {
                    array1[index] = (int)array2[index];
                }
            }

            sw.Stop();
            Console.WriteLine("Unboxing: {0}", sw.Elapsed);

            sw.Reset();
            sw.Start();

            for (int loop = 0; loop < 100; loop++)
            {
                for (int index = 0; index < array1.Length; index++)
                {
                    array3[index] = array1[index];
                }
            }

            sw.Stop();
            Console.WriteLine("Copying: {0}", sw.Elapsed);
        }
    }
}