代码：

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

namespace PerfCounterDemo
{
    class Program
    {
        static void Main(string[] args)
        {


            if (!PerformanceCounterCategory.Exists("ConsolePerfCategory"))
            {
                PerformanceCounterCategory.Create("ConsolePerfCategory",
                    "My category description.",
                    PerformanceCounterCategoryType.SingleInstance,
                    "ConsolePerf",
                    "console performace counter.");
            }
            else
            {
                Console.WriteLine("ConsolePerfCategory already exists");
            }


            PerformanceCounter counter = new PerformanceCounter("ConsolePerfCategory", "ConsolePerf",false);
            Thread.Sleep(10000);
            Console.WriteLine("start");
            double ret = 0;
            double increment = 0.0;
            for (; ; increment += 0.05)
            {
                ret = Math.Sin(increment) * 40 + 50;
                ret = ret < 0 ? 0 : ret;
                Console.WriteLine(ret);
                counter.RawValue = (long)ret;
                Thread.Sleep(200);
            }


        }
    }
}

效果图：

补充：

性能计数器监视器的进入方式：

运行->perfmon->添加->选择计数器名称即可