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

 namespace StopWatchTest
 {
     class Program
     {
         static void Main(string[] args)
         {
             Stopwatch sw = new Stopwatch();
             string s = string.Empty;
             StringBuilder sb = new StringBuilder();
             ;
             sw.Start();
             ; i < ticks; i++) s += "a";
             sw.Stop();
             TimeSpan ts = sw.Elapsed;
             Console.WriteLine("string append 'a' {0} times using time in time: {1}, in milliSeconds: {2}, ticks: {3}", ticks.ToString(), ts.ToString(), ts.Milliseconds.ToString(), ts.Ticks.ToString());
             sw.Restart();
             ; i < ticks; i++) sb.Append("a");
             sw.Stop();
             //ts = sw.Elapsed;
             Console.WriteLine("StringBuilder append 'a' {0} times using time in time: {1}, in milliSeconds: {2}, ticks: {3}", ticks.ToString(), sw.Elapsed.ToString(), sw.ElapsedMilliseconds.ToString(), sw.ElapsedTicks.ToString());
         }
     }
 }