发现一个问题，有个类没法实例化~(IDE问题，已经OK)

ManagementObjectCollection.ManagementObjectEnumerator不能使用，不知道是不是private？但是MSDN上提供了类的介绍。

MSDN上的demo如下：
using System;
using System.Management;

// This example demonstrates how to enumerate all logical disks
// using the ManagementObjectEnumerator object.
class Sample_ManagementObjectEnumerator
{
public static int Main(string[] args) {
ManagementClass diskClass = new ManagementClass("Win32_LogicalDisk");
ManagementObjectCollection disks = diskClass.GetInstances();
ManagementObjectCollection.ManagementObjectEnumerator disksEnumerator =
disks.GetEnumerator();
while(disksEnumerator.MoveNext()) {
ManagementObject disk = (ManagementObject)disksEnumerator.Current;
Console.WriteLine("Disk found: " + disk["deviceid"]);
}
return 0;
}
}