C# 在放入或取出密钥时获取USB唯一ID

我需要在放置/移除USB时获得唯一的USB ID（不是卷序列号）。但无论如何，“PNPDeviceID”总是空的。 我使用的代码是：

static void Main(string[] args)
{ 
    const string QUERY = @"select * from __InstanceOperationEvent within 1 where TargetInstance isa 'Win32_LogicalDisk' and (TargetInstance.DriveType=2)"; 
    Program p = new Program(); 
    ManagementEventWatcher w = new ManagementEventWatcher(new WqlEventQuery(QUERY));
    w.EventArrived += new EventArrivedEventHandler(p.OnWMIEvent); 
    w.Start();
    Console.ReadKey();
    w.Stop();
}

public void OnWMIEvent(object sender, EventArrivedEventArgs e)
{
    PropertyData p = e.NewEvent.Properties["TargetInstance"]; 
    if (p != null) 
    {
        ManagementBaseObject mbo = p.Value as ManagementBaseObject;
        PropertyData deviceid = mbo.Properties["DeviceID"]; 
        PropertyData drivetype = mbo.Properties["DriveType"];
        PropertyData driveSerial = mbo.Properties["VolumeSerialNumber"];
        PropertyData driveGUID = mbo.Properties["PNPDeviceID"];

        Console.WriteLine("{0}-{1}", "DeviceID",deviceid.Value); 
        Console.WriteLine("{0}-{1}", "DriveType",drivetype.Value);
        Console.WriteLine("{0}-{1}", "DriveSerial", driveSerial.Value);
        Console.WriteLine("{0}-{1}", "driveGUID", driveGUID.Value);
        Console.WriteLine();
    }
} 

资料来源是：

我可以通过以下代码获得唯一的USB id：

ManagementObjectSearcher theSearcher = 
    new ManagementObjectSearcher("SELECT * FROM Win32_DiskDrive WHERE InterfaceType='USB'");

foreach(ManagementObject currentObject in theSearcher.Get())
{
    Console.WriteLine("{0}-{1}", "PNPDeviceID", currentObject.Properties["PNPDeviceID"].Value);            
}

因此，请您告诉我，当我放置/移除U盘时，如何组合它们以接收PNPDeviceId（USB GUID）

如果您直接查询该类，并且没有获得PNPDeviceId属性的值，那么在wmi事件中使用该类时，您也不会获得值。相反，您可以将该类与

\uu InstanceOperationEvent

内部事件一起使用

Select * From __InstanceOperationEvent Within 1 Where TargetInstance ISA 'Win32_DiskDrive' and TargetInstance.InterfaceType='USB'