性能监视Stopwatch使用

 Stopwatch watch = new Stopwatch();
            watch.Start();
            ArrayList al = new ArrayList();
            for (long i = 0; i < 1000000; i++)
            {
                al.Add(i);
            }
            watch.Stop();
            Console.WriteLine(watch.ElapsedMilliseconds);

            watch.Reset();

            watch.Start();
            List<int> list = new List<int>();
            for (int i = 0; i < 1000000; i++)
            {
                list.Add(i);
            }
            watch.Stop();
            Console.WriteLine(watch.ElapsedMilliseconds);