用C#語言獲取CPU利用率

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. 
[STAThread] 
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"; 
} 

這是在我計算機上的計算結果： 
Entering measurement loop. 
CPU load = 0 %. 
CPU load = 1.941746 %. 
CPU load = 4.854369 %. 
CPU load = 10 %. 
CPU load = 0 %. 
CPU load = 2.999997 %. 
CPU load = 0.9900987 %. 
CPU load = 0 %.