private static string GetIdentifier(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;     }       private static string GetIdentifier(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;     }       // cpu id  GetIdentifier("Win32_Processor", "UniqueId");   //processor id GetIdentifier("Win32_Processor", "ProcessorId");   //processor name GetIdentifier("Win32_Processor", "Name");     //Manufacturer GetIdentifier("Win32_Processor", "Manufacturer");     //BIOS Identifier     private static string GetBiosId()     {       return GetIdentifier("Win32_BIOS", "Manufacturer")       + GetIdentifier("Win32_BIOS", "SMBIOSBIOSVersion")       + GetIdentifier("Win32_BIOS", "IdentificationCode")       + GetIdentifier("Win32_BIOS", "SerialNumber")       + GetIdentifier("Win32_BIOS", "ReleaseDate")       + GetIdentifier("Win32_BIOS", "Version");     }     //Main physical hard drive ID     private static string GetDiskId()     {       return GetIdentifier("Win32_DiskDrive", "Model")       + GetIdentifier("Win32_DiskDrive", "Manufacturer")       + GetIdentifier("Win32_DiskDrive", "Signature")       + GetIdentifier("Win32_DiskDrive", "TotalHeads");     }     //Motherboard ID     private static string GetBaseId()     {       return GetIdentifier("Win32_BaseBoard", "Model")       + GetIdentifier("Win32_BaseBoard", "Manufacturer")       + GetIdentifier("Win32_BaseBoard", "Name")       + GetIdentifier("Win32_BaseBoard", "SerialNumber");     }     //Primary video controller ID     private static string GetVideoId()     {       return GetIdentifier("Win32_VideoController", "DriverVersion")       + GetIdentifier("Win32_VideoController", "Name");     }     //First enabled network card ID     private static string GetMacId()     {       return GetIdentifier("Win32_NetworkAdapterConfiguration", "MACAddress", "IPEnabled");     }