public string GetDiskID()
        {

            String HDid = null;
            ManagementClass cimobject1 = new ManagementClass("Win32_DiskDrive");
            ManagementObjectCollection moc1 = cimobject1.GetInstances();
            foreach (ManagementObject mo in moc1)
            {
                HDid = mo.Properties["Model"].Value as string;
                foreach (PropertyData var in mo.Properties)
                {
                    Console.WriteLine("属性名: "+var.Name+"值: "+var.Value);
                }
            }