C # ask for help when getting the hard disk serial number,

C # ask for help when getting the hard disk serial number,

The specific problem is as follows: I used the following code to obtain the hard disk information to create an exe file. When testing on the machine, the result of double-click operation is different from that of running as administrator. How can this problem be solved?

1 public static String GetHardWareId () 2 {3 String num = null; 4 List <String> hdids = new List <string> (); 5 ManagementClass mc = new ManagementClass ("Win32_PhysicalMedia"); 6 ManagementObjectCollection moc = mc. getInstances (); 7 foreach (var item in moc) 8 {9 String hdid = (string) item. properties ["SerialNumber"]. value. toString (); 10 if (! String. isNullOrEmpty (hdid) {hdids. add (hdid) ;}11} 12 for (int I = 0; I  
The result is as follows: