c#获取硬盘编号

ManagementClass mc = new ManagementClass("Win32_PhysicalMedia");
//Win32_DiskDrive不包含SerialNumber属性。
ManagementObjectCollection moc = mc.GetInstances();
string strID = null ;  
foreach( ManagementObject mo in moc )  
{  
　　strID = mo.Properties["SerialNumber"].Value.ToString();
　　break; 

}

textBox1.Text +=  "硬盘 ID:" + strID;