C# 实现计算函数耗时的方法

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

namespace ConsoleApp9
{
    class Program
    {
        
        static void Main(string[] args)
        {
            Stopwatch stopwatch = new Stopwatch();
            stopwatch.Start();
            // 让线程暂停5秒（5000毫秒）
            Thread.Sleep(5000);
            stopwatch.Stop();
            // 获取运行时间
            TimeSpan ts = stopwatch.Elapsed;
            // 格式化并显示时间
            string elapsedTime = String.Format("{0:00}:{1:00}:{2:00}.{3:00}",
                ts.Hours, ts.Minutes, ts.Seconds,
                ts.Milliseconds / 10);
            Console.WriteLine("Time: " + elapsedTime);
            Console.ReadLine();
        }
    }
}