Detecter Disque dur usb

private void lookForUsdDrive()
{

	foreach (ManagementObject drive in new ManagementObjectSearcher("select * from Win32_DiskDrive where InterfaceType='USB'").Get())
	{
		foreach (ManagementObject partition in new ManagementObjectSearcher("ASSOCIATORS OF {Win32_DiskDrive.DeviceID='" + drive["DeviceID"] + "'} WHERE AssocClass =Win32_DiskDriveToDiskPartition").Get())
		{
			Console.WriteLine("Partition=" + partition["Name"]);

			foreach (ManagementObject disk in new ManagementObjectSearcher("ASSOCIATORS OF {Win32_DiskPartition.DeviceID='" + partition["DeviceID"] + "'} WHERE AssocClass =Win32_LogicalDiskToPartition").Get())
			{
				DriveInfo drvinf = new DriveInfo(disk["Name"] + "\\");
				Console.WriteLine("Name:" + drvinf.Name);
				Console.WriteLine(" -DriveFormat:" + drvinf.DriveFormat);
				Console.WriteLine(" -DriveType:" + drvinf.DriveType);
				Console.WriteLine(" -IsReady:" + drvinf.IsReady);
				Console.WriteLine(" -RootDirectory:" + drvinf.RootDirectory);
				Console.WriteLine(" -TotalFreeSpace:" + drvinf.TotalFreeSpace);
				Console.WriteLine(" -TotalSize:" + drvinf.TotalSize);
				Console.WriteLine(" -VolumeLabel:" + drvinf.VolumeLabel);
			}
		}
	}

	return;
}