title: How to detect the original MAC address after it has been spoofed?
body: <p>We are using the following code for retrieving active MAC address of a windows pc.</p>
  
  <pre><code>private static string macId()
  {
      return identifier("Win32_NetworkAdapterConfiguration", "MACAddress", "IPEnabled");
  }
  
  private static string identifier(string wmiClass, string wmiProperty, string wmiMustBeTrue)
  {
      string result = "";
      System.Management.ManagementClass mc = new System.Management.ManagementClass(wmiClass);
      System.Management.ManagementObjectCollection moc = mc.GetInstances();
      foreach (System.Management.ManagementObject mo in moc)
      {
          if (mo[wmiMustBeTrue].ToString() == "True")
          {
              //Only get the first one
              if (result == "")
              {
                  try
                  {
                      result = mo[wmiProperty].ToString();
                      break;
                  }
                  catch
                  {
                  }
              }
          }
      }
      return result;
  }
  //Return a hardware identifier
  private static string identifier(string wmiClass, string wmiProperty)
  {
      string result = "";
      System.Management.ManagementClass mc = new System.Management.ManagementClass(wmiClass);
      System.Management.ManagementObjectCollection moc = mc.GetInstances();
      foreach (System.Management.ManagementObject mo in moc)
      {
          //Only get the first one
          if (result == "")
          {
              try
              {
                  result = mo[wmiProperty].ToString();
                  break;
              }
              catch
              {
              }
          }
      }
      return result;
  }
  </code></pre>
  
  <p>It works fine to retrieve the MAC address. The problem is when the MAC address is spoofed then it returns the spoofed MAC address. We want to somehow retrieve the original MAC address which is unique and assigned at the factory. Is there any way to do so?</p>