cannot get CPU serial number in C#

Question

I am trying to get the CPU serial number but I cannot do it. I can get board and harddisk but not cpu.

here is my code below. what am I doing wrong?

public static void GetClientComputerInfo()
    {
        HDDSerial = "0";
        BoardSerial = "0";
        CPUSerial = "0";

        try
        {
            ManagementObjectSearcher searcher = new ManagementObjectSearcher("select * from Win32_DiskDrive");

            foreach (ManagementObject share in searcher.Get())
            {
                foreach (PropertyData PC in share.Properties)
                {
                    if (PC.Name == "SerialNumber")
                    {
                        HDDSerial = PC.Value.ToString();
                    }

                    if (PC.Name == "SerialNumber")
                    {
                        BoardSerial = PC.Value.ToString();
                    }

                    if (PC.Name == "ProcessorID")
                    {
                        CPUSerial = PC.Value.ToString();
                    }
                }
            }
        }
        catch
        {

        }
    }

Answer 1

Try this one

 string cpuInfo = string.Empty;
    ManagementClass mc = new ManagementClass("win32_processor");
    ManagementObjectCollection moc = mc.GetInstances();

    foreach (ManagementObject mo in moc)
    {
         cpuInfo = mo.Properties["processorID"].Value.ToString();
         break;
    }

Code Extracted from here