FTD2XX_NET.FTDI.ReadFT232REEPROM C# (CSharp) Method

        public FT_STATUS ReadFT232REEPROM(FT232R_EEPROM_STRUCTURE ee232r)
        {
            // Initialise ftStatus to something other than FT_OK
            FT_STATUS ftStatus = FT_STATUS.FT_OTHER_ERROR;
            FT_ERROR ftErrorCondition = FT_ERROR.FT_NO_ERROR;

            // If the DLL hasn't been loaded, just return here
            if (hFTD2XXDLL == IntPtr.Zero)
                return ftStatus;

            // Check for our required function pointers being set up
            if (pFT_EE_Read != IntPtr.Zero)
            {
                tFT_EE_Read FT_EE_Read = (tFT_EE_Read)Marshal.GetDelegateForFunctionPointer(pFT_EE_Read, typeof(tFT_EE_Read));

                if (ftHandle != IntPtr.Zero)
                {
                    FT_DEVICE DeviceType = FT_DEVICE.FT_DEVICE_UNKNOWN;
                    // Check that it is an FT232R or FT245R that we are trying to read
                    GetDeviceType(ref DeviceType);
                    if (DeviceType != FT_DEVICE.FT_DEVICE_232R)
                    {
                        // If it is not, throw an exception
                        ftErrorCondition = FT_ERROR.FT_INCORRECT_DEVICE;
                        ErrorHandler(ftStatus, ftErrorCondition);
                    }

                    FT_PROGRAM_DATA eedata = new FT_PROGRAM_DATA();

                    // Set up structure headers
                    eedata.Signature1 = 0x00000000;
                    eedata.Signature2 = 0xFFFFFFFF;
                    eedata.Version = 2;

                    // Allocate space from unmanaged heap
                    eedata.Manufacturer = Marshal.AllocHGlobal(32);
                    eedata.ManufacturerID = Marshal.AllocHGlobal(16);
                    eedata.Description = Marshal.AllocHGlobal(64);
                    eedata.SerialNumber = Marshal.AllocHGlobal(16);

                    // Call FT_EE_Read
                    ftStatus = FT_EE_Read(ftHandle, eedata);

                    // Retrieve string values
                    ee232r.Manufacturer = Marshal.PtrToStringAnsi(eedata.Manufacturer);
                    ee232r.ManufacturerID = Marshal.PtrToStringAnsi(eedata.ManufacturerID);
                    ee232r.Description = Marshal.PtrToStringAnsi(eedata.Description);
                    ee232r.SerialNumber = Marshal.PtrToStringAnsi(eedata.SerialNumber);

                    // Free unmanaged buffers
                    Marshal.FreeHGlobal(eedata.Manufacturer);
                    Marshal.FreeHGlobal(eedata.ManufacturerID);
                    Marshal.FreeHGlobal(eedata.Description);
                    Marshal.FreeHGlobal(eedata.SerialNumber);

                    // Map non-string elements to structure to be returned
                    // Standard elements
                    ee232r.VendorID = eedata.VendorID;
                    ee232r.ProductID = eedata.ProductID;
                    ee232r.MaxPower = eedata.MaxPower;
                    ee232r.SelfPowered = Convert.ToBoolean(eedata.SelfPowered);
                    ee232r.RemoteWakeup = Convert.ToBoolean(eedata.RemoteWakeup);
                    // 232R specific fields
                    ee232r.UseExtOsc = Convert.ToBoolean(eedata.UseExtOsc);
                    ee232r.HighDriveIOs = Convert.ToBoolean(eedata.HighDriveIOs);
                    ee232r.EndpointSize = eedata.EndpointSize;
                    ee232r.PullDownEnable = Convert.ToBoolean(eedata.PullDownEnableR);
                    ee232r.SerNumEnable = Convert.ToBoolean(eedata.SerNumEnableR);
                    ee232r.InvertTXD = Convert.ToBoolean(eedata.InvertTXD);
                    ee232r.InvertRXD = Convert.ToBoolean(eedata.InvertRXD);
                    ee232r.InvertRTS = Convert.ToBoolean(eedata.InvertRTS);
                    ee232r.InvertCTS = Convert.ToBoolean(eedata.InvertCTS);
                    ee232r.InvertDTR = Convert.ToBoolean(eedata.InvertDTR);
                    ee232r.InvertDSR = Convert.ToBoolean(eedata.InvertDSR);
                    ee232r.InvertDCD = Convert.ToBoolean(eedata.InvertDCD);
                    ee232r.InvertRI = Convert.ToBoolean(eedata.InvertRI);
                    ee232r.Cbus0 = eedata.Cbus0;
                    ee232r.Cbus1 = eedata.Cbus1;
                    ee232r.Cbus2 = eedata.Cbus2;
                    ee232r.Cbus3 = eedata.Cbus3;
                    ee232r.Cbus4 = eedata.Cbus4;
                    ee232r.RIsD2XX = Convert.ToBoolean(eedata.RIsD2XX);
                }
            }
            else
            {
                if (pFT_EE_Read == IntPtr.Zero)
                {
                    LogB.Debug("FTD2XX: Failed to load function FT_EE_Read.");
                }
            }
            return ftStatus;
        }

 //end Properties
 //=======================================
 //Public Methods
 /// <summary>
 /// Read FTDI EEPROM
 /// </summary>
 /// <param name="dev"></param>
 /// <returns></returns>
 public FTDI.FT_STATUS readFtdiEEProm(FTDI dev)
 {
     FTDI.FT_STATUS ftStatus = FTDI.FT_STATUS.FT_OK;
     ftEeprom = new FTDI.FT232R_EEPROM_STRUCTURE();
     try
     {
         ftStatus = dev.ReadFT232REEPROM(ftEeprom);
     }
     catch (FTDI.FT_EXCEPTION ex)
     {
         throw ex;
     }
     return ftStatus;
 }