using System;

using System.Diagnostics;

​

public class Program

{

    public static void Main()

    {

        var sw = new Stopwatch();

        sw.Start();

            var array = new int[10000];

for (var i = 0; i < 10000; i++) {

  for (var j = 0; j < 100000; j++) {

    array[i] = array[i] + j;

  }

}

        sw.Stop();

        Console.WriteLine(sw.Elapsed.TotalMilliseconds);

    }

}