c# 檢測cpu使用率

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

//引用2命名空間
using System.Diagnostics;
using System.Threading;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Process[] p = Process.GetProcessesByName("devenv");//獲取指定進程信息
            // Process[] p = Process.GetProcesses();//獲取所有進程信息
            string cpu = string.Empty;
            string info = string.Empty;

            PerformanceCounter pp = new PerformanceCounter();//性能計數器
            pp.CategoryName = "Process";//指定獲取計算機進程信息  如果傳Processor參數代表查詢計算機CPU
            pp.CounterName = "% Processor Time";//占有率
            //如果pp.CategoryName="Processor",那麼你這裡賦值這個參數 pp.InstanceName = "_Total"代表查詢本計算機的總CPU。
            pp.InstanceName = "devenv";//指定進程
            pp.MachineName = ".";
            if (p.Length > 0)
            {
                foreach (Process pr in p)
                {
                    while (true)//1秒鐘讀取一次CPU占有率。
                    {
                        info = pr.ProcessName + "內存：" +