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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;
            }

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bool value;
if(value.ToString.Length() == 4)
  return true;
else if(value.ToString.Length() == 5)
  return false;

else
  return !true && !false;