//引入命名空间
using System; 
using System.Management;
 
class Sample 
{ 
    public static void Main(string[] args) 
    { 
        SelectQuery sQuery = 
            new SelectQuery(
            "SELECT * FROM Win32_Service WHERE State='Stopped'"); 

        // or 

        // This is equivalent to "SELECT * FROM Win32_Service"
        SelectQuery query = new SelectQuery("Win32_Service");
    }
}

//引入命名空间
using System;
using System.Management;

public class Sample 
{
    public static void Main(string[] args) 
    {
        SelectQuery s = 
            new SelectQuery(true,
            "__CLASS = 'Win32_Service'");
        
        ManagementObjectSearcher searcher = 
            new ManagementObjectSearcher(
            s);

        foreach (ManagementObject service in searcher.Get()) 
        {
            // show the class
            Console.WriteLine(service.ToString());
        }
    }
}

//引入命名空间
using System;
using System.Management;

public class Sample 
{
    public static void Main(string[] args) 
    {
        SelectQuery s = 
            new SelectQuery("Win32_Service",
            "State = 'Stopped'");
        
        ManagementObjectSearcher searcher = 
            new ManagementObjectSearcher(
            s);

        foreach (ManagementObject service in searcher.Get()) 
        {
            // show the class
            Console.WriteLine(service.ToString());
        }
    }
}

//引入命名空间
using System;
using System.Management;

public class Sample 
{
    public static void Main(string[] args) 
    {
        String[] properties = 
            {"Name", "Handle"};

        SelectQuery s = new SelectQuery("Win32_Process",
            "Name = 'notepad.exe'", 
            properties);

        ManagementObjectSearcher searcher = 
            new ManagementObjectSearcher(
            s);

        foreach (ManagementObject o in searcher.Get()) 
        {
            // show the class
            Console.WriteLine(o.ToString());
        }
    }
}