class Program    {        static void Main(string[] args)        {            System.Diagnostics.Stopwatch sw = new System.Diagnostics.Stopwatch();            sw.Start();            for (int i = 0; i < 50000000; i++)            {                //Code            }            sw.Stop();            Console.WriteLine("Total：" + sw.ElapsedMilliseconds + "ms");            Console.ReadLine();        }    }