C# StopWatch

        static void Main(string[] args)
        {

            Stopwatch watch = new Stopwatch();
            watch.Start();
            Console.WriteLine("Time1 = " + watch.ElapsedMilliseconds);
            IEnumerable<string> lsFiles = Directory.EnumerateFiles(@"D:\", "*.*", SearchOption.AllDirectories);
            Console.WriteLine("Time2 = " + watch.ElapsedMilliseconds);
            foreach (var item in lsFiles)
            {

            }
            Console.WriteLine("Time3 = " + watch.ElapsedMilliseconds);
            watch.Stop();
            watch.Restart();
            Console.WriteLine("Time3 = " + watch.ElapsedMilliseconds);
            watch.Stop();
        }