一、性能监控的作用

性能监控可以用于获取关于应用程序的正常行为的一般消息，性能监控是一个强大的工具，有助于理解系统的工作负载，观察变化和趋势，尤其是运行在服务器上的应用程序

二、性能监控类（System.Diagnostics）：
PerformanceCounter类：监控计数与写入计数。还可以使用这个类创建新的性能类别
PerformanceCounterCategory类：可以查看所有的已有的类别，以及创建类别。可以以编程的方式获得一个类别中的所有计数器
performanceCounterInstall类：用于安装性能计数器

需要引用WindowsBase

三、创建性能类别（两种创建方式）：

1，图形化创建：

2，代码创建+操作（可以监控不同应用程序的性能计数）：

 using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Windows.Threading;
using System.Diagnostics;
namespace PerformanceCountTest2
{public partial class Form1 : Form{//性能计数器的实例名称private const string _NewPerformanceCounterName = "PerformanceCountTest2";//性能计数器的类型名称private const string _PerformanceCounterCategoryName = "MyZhangDi";//性能计数器名称private SortedList<string, Tuple<string, string>> _PerformanceCounterNames;//-----性能计数器（组件）//记录按钮点击的次数private PerformanceCounter buttonClickCount;//记录按钮每秒点击的次数private PerformanceCounter buttonClickCountSec;//存放按钮每秒点击的次数的变量private int Record_buttonClickCount = 0;//初始化性能计数器名称private void InitialziePerformanceCounterNames(){_PerformanceCounterNames = new SortedList<string, Tuple<string, string>>();_PerformanceCounterNames.Add("buttonClickCount", Tuple.Create("buttonClickCount", "记录按钮点击的次数"));_PerformanceCounterNames.Add("buttonClickCountSec", Tuple.Create("buttonClickCountSec", "记录按钮每秒点击的次数"));}//初始化性能计数器（组件）private void InitializePerformanceCounter(){buttonClickCount = new PerformanceCounter{CategoryName = _PerformanceCounterCategoryName,//性能计数器类型名称CounterName = _PerformanceCounterNames["buttonClickCount"].Item1,//性能计数器名称MachineName = ".",//本地计算机InstanceLifetime = PerformanceCounterInstanceLifetime.Process,//生命周期ReadOnly = false,//可写InstanceName = _NewPerformanceCounterName//实例名称};buttonClickCountSec = new PerformanceCounter{CategoryName = _PerformanceCounterCategoryName,//性能计数器类型名称CounterName = _PerformanceCounterNames["buttonClickCountSec"].Item1,//性能计数器名称MachineName = ".",//本地计算机InstanceLifetime = PerformanceCounterInstanceLifetime.Process,//生命周期ReadOnly = false,//可写InstanceName = _NewPerformanceCounterName//实例名称};}//注册性能计数器private void RegisterPerformanceCounter(){//判断此计数器类型名称是否存在if (!PerformanceCounterCategory.Exists(_PerformanceCounterCategoryName)){var CounterCreationDatas = new CounterCreationData[2];CounterCreationDatas[0] = new CounterCreationData{CounterName = _PerformanceCounterNames["buttonClickCount"].Item1,CounterHelp = _PerformanceCounterNames["buttonClickCount"].Item2,CounterType = PerformanceCounterType.NumberOfItems32};CounterCreationDatas[1] = new CounterCreationData{CounterName = _PerformanceCounterNames["buttonClickCountSec"].Item1,CounterHelp = _PerformanceCounterNames["buttonClickCountSec"].Item2,CounterType = PerformanceCounterType.RateOfCountsPerSecond32};CounterCreationDataCollection counts = new CounterCreationDataCollection(CounterCreationDatas);//创建类型PerformanceCounterCategory.Create(_PerformanceCounterCategoryName, "类型描述", PerformanceCounterCategoryType.MultiInstance, counts);}}public Form1(){InitializeComponent();}private void Form1_Load(object sender, EventArgs e){InitialziePerformanceCounterNames();InitializePerformanceCounter();DispatcherTimer timer = new DispatcherTimer(TimeSpan.FromSeconds(1),DispatcherPriority.Background,delegate{//存放按钮每秒点击的次数的变量 赋值给 每秒点击的次数buttonClickCountSec.RawValue = this.Record_buttonClickCount;//初始化值（存放按钮每秒点击的次数的变量）this.Record_buttonClickCount = 0;},Dispatcher.CurrentDispatcher);//开启时间计数器timer.Start();}/// <summary>/// 注册性能计数器/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void button1_Click(object sender, EventArgs e){RegisterPerformanceCounter();}/// <summary>/// 点击测试/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void button2_Click(object sender, EventArgs e){buttonClickCount.Increment();Record_buttonClickCount++;//用于每秒点击的次数}}
}

3，使用性能监视器查看