using System;

using System.Diagnostics;

​

​

public class Program

{

    public static void Main()

    {

        int max = 9999999;

        Stopwatch stopWatch = new Stopwatch();

​

        Console.WriteLine("Do While Loop: ");

        stopWatch.Start();

        DoWhileLoop(max);

        stopWatch.Stop();

        DisplayElapsedTime(stopWatch.Elapsed);

        Console.WriteLine("");

        Console.WriteLine("");

​

        Console.WriteLine("While Loop: ");

        stopWatch.Start();

        WhileLoop(max);

        stopWatch.Stop();

        DisplayElapsedTime(stopWatch.Elapsed);

        Console.WriteLine("");

        Console.WriteLine("");

​

        Console.WriteLine("For Loop: ");

        stopWatch.Start();

        ForLoop(max);

        stopWatch.Stop();

        DisplayElapsedTime(stopWatch.Elapsed);

    }

​

    private static void DoWhileLoop(int max)

    {

        int i = 0;

        do

        {

            //Performe Some Operation. By removing Speed increases

            var j = 10 + 10;

            j += 25;

            i++;

        } while (i <= max);

    }

​

    private static void WhileLoop(int max)

    {

        int i = 0;

        while (i <= max)

        {

            //Performe Some Operation. By removing Speed increases

            var j = 10 + 10;

            j += 25;

            i++;

        };

    }

​

    private static void ForLoop(int max)

    {

        for (int i = 0; i <= max; i++)

        {

            //Performe Some Operation. By removing Speed increases

            var j = 10 + 10;

            j += 25;

        }

    }

​

    private static void DisplayElapsedTime(TimeSpan ts)

    {

        string elapsedTime = String.Format("{0:00}:{1:00}:{2:00}.{3:00}", ts.Hours, ts.Minutes, ts.Seconds, ts.Milliseconds / 10);

        Console.WriteLine(elapsedTime, "RunTime");

    }

}