现在我们来讲一下如何利用C#开发一个时时获取CPU使用率的程序，首先我们来看一下

public class CpuLoadInfo

这个CpuLoadInfo是用于加载CPU信息的一个类，接下来在类中可以看到首先声明两个方法

第一个是有参数的Say方法，第二个是没有参数的Say方法，分别是在控制台输出信息和调用

原来的Say方法。

接下为在主方法中，调用第一个Say方法输出各种信息

 

    using System;

    using System.Diagnostics;

    using System.Threading;

    

    public class CpuLoadInfo

    {

    // auxiliary print methods

    private static void Say(string txt)

    {

    Console.WriteLine(txt);

    }

    

    // auxiliary print methods

    private static void Say()

    {

    Say("");

    }

    

    // The main method. Command line arguments are     ignored.

 

    public static void Main()

    {

    Say("$Id: CpuLoadInfo.cs,v 1.2 2002/08/17     17:45:48 rz65 Exp $");

    Say();

    Say("Attempt to create a PerformanceCounter     instance:");

    Say("Category name = " + CategoryName);

    Say("Counter name = " + CounterName);

    Say("Instance name = " + InstanceName);

    

    PerformanceCounter pc = new PerformanceCounter    (CategoryName,CounterName,InstanceName);

    Say("Performance counter was created.");

    Say("Property CounterType: " + pc.CounterType);

    Say();

    Say("Property CounterHelp: " +     pc.CounterHelp);

    Say();

    Say("Entering measurement loop.");

  

    while(true)

    {

    Thread.Sleep(1000); // wait for 1 second

    float cpuLoad = pc.NextValue();

    Say("CPU load = " + cpuLoad + " %.");

    }

    }

    

    // constants used to select the performance counter.

private const string CategoryName = "Processor";

private const string CounterName = "% Processor Time";

private const string InstanceName = "_Total";

    }