Gurux.DLMS.GXDLMSServer.GenerateConfirmedServiceError C# (CSharp) Method

        internal static byte[] GenerateConfirmedServiceError(ConfirmedServiceError service, ServiceError type, byte code)
        {
            return new byte[] { (byte)Command.ConfirmedServiceError, (byte)service, (byte)type, code };
        }

        public static void HandleGetRequest(GXDLMSSettings settings, GXDLMSServer server, GXByteBuffer data, GXByteBuffer replyData, GXDLMSTranslatorStructure xml)
        {
            //Return error if connection is not established.
            if (xml == null && settings.Connected == ConnectionState.None && !settings.CanAccess())
            {
                replyData.Set(GXDLMSServer.GenerateConfirmedServiceError(ConfirmedServiceError.InitiateError,
                                                                         ServiceError.Service, (byte)Service.Unsupported));
                return;
            }
            byte           invokeID = 0;
            GetCommandType type     = GetCommandType.NextDataBlock;

            //If GBT is used data is empty.
            if (data.Size != 0)
            {
                type = (GetCommandType)data.GetUInt8();
                // Get invoke ID and priority.
                invokeID = data.GetUInt8();
                settings.UpdateInvokeId(invokeID);
                if (xml != null)
                {
                    xml.AppendStartTag(Command.GetRequest);
                    xml.AppendStartTag(Command.GetRequest, type);
                    xml.AppendLine(TranslatorTags.InvokeId, "Value", xml.IntegerToHex(invokeID, 2));
                }
            }
            // GetRequest normal
            if (type == GetCommandType.Normal)
            {
                GetRequestNormal(settings, invokeID, server, data, replyData, xml);
            }
            else if (type == GetCommandType.NextDataBlock)
            {
                // Get request for next data block
                GetRequestNextDataBlock(settings, invokeID, server, data, replyData, xml, false);
            }
            else if (type == GetCommandType.WithList)
            {
                // Get request with a list.
                GetRequestWithList(settings, invokeID, server, data, replyData, xml);
            }
            else
            {
                Debug.WriteLine("HandleGetRequest failed. Invalid command type.");
                settings.ResetBlockIndex();
                GXByteBuffer bb = new GXByteBuffer();
                // Access Error : Device reports a hardware fault.
                bb.SetUInt8((byte)ErrorCode.HardwareFault);
                GXDLMS.GetLNPdu(new GXDLMSLNParameters(null, settings, invokeID, Command.GetResponse, (byte)type, null, bb, (byte)ErrorCode.Ok), replyData);
            }
            if (xml != null)
            {
                xml.AppendEndTag(Command.GetRequest, type);
                xml.AppendEndTag(Command.GetRequest);
            }
        }