protected static FR_Guid Execute(DbConnection Connection, DbTransaction Transaction, P_L3PY_CATfDF_0849 Parameter, CSV2Core.SessionSecurity.SessionSecurityTicket securityTicket = null)
        {
            //Leave UserCode region to enable user code saving
            #region UserCode
            var returnValue = new FR_Guid();

            /*
             * 0. Load current fiscal year
             * 1. Find bill recepient and load his customer booking account
             * 2. Find tenant's "other income" booking account i.e. revenue account for tax that is 0%
             * 3. Create one transaction and multiple booking lines
             */

            #region 0. Load current fiscal year

            Guid currentFiscalYearID = CL2_FiscalYear.Complex.Retrieval.cls_Get_Current_FiscalYear.Invoke(Connection, Transaction, securityTicket).Result.ACC_FiscalYearID;

            #endregion

            #region 1. Find bill recepient to load his customer booking account

            var billHeader = new CL1_BIL.ORM_BIL_BillHeader();
            billHeader.Load(Connection, Transaction, Parameter.BillHeaderID);

            var cbaParam = new CL3_BookingAccounts.Atomic.Retrieval.P_L3BA_GBAPBPAfBP_1717
            {
                FiscalYearID               = currentFiscalYearID,
                IsCustomerAccount          = true,
                BusinessParticipantID_List = new Guid[] { billHeader.BillRecipient_BuisnessParticipant_RefID }
            };
            Guid customerBookingAccountID = CL3_BookingAccounts.Atomic.Retrieval.cls_Get_BookingAccount_Purpose_BPAssignment_for_BPID_List.Invoke(
                Connection, Transaction, cbaParam, securityTicket).Result.Single().BookingAccount_RefID;

            #endregion

            #region 2. Find tenant's "other incomes" booking account i.e. revenue account for tax that is 0%

            Guid tenantBPID = CL1_CMN_BPT.ORM_CMN_BPT_BusinessParticipant.Query.Search(Connection, Transaction,
                                                                                       new CL1_CMN_BPT.ORM_CMN_BPT_BusinessParticipant.Query
            {
                IfTenant_Tenant_RefID = securityTicket.TenantID,
                IsDeleted             = false,
                Tenant_RefID          = securityTicket.TenantID
            }).Single().CMN_BPT_BusinessParticipantID;

            var taxZero = CL1_ACC_TAX.ORM_ACC_TAX_Tax.Query.Search(Connection, Transaction,
                                                                   new CL1_ACC_TAX.ORM_ACC_TAX_Tax.Query
            {
                IsDeleted    = false,
                Tenant_RefID = securityTicket.TenantID
            }).SingleOrDefault(x => Double.Equals(x.TaxRate, 0.0d));

            if (taxZero == null)
            {
                return(returnValue);
            }

            var tbaParam = new CL3_BookingAccounts.Atomic.Retrieval.P_L3BA_GAfTaFY_1647
            {
                FiscalYearID     = currentFiscalYearID,
                IsRevenueAccount = true,
                IsTaxAccount     = false,
                TaxID            = new Guid[] { taxZero.ACC_TAX_TaxeID }
            };
            Guid otherIncomeAccountID = CL3_BookingAccounts.Atomic.Retrieval.cls_Get_Assignment_for_TaxID_List_and_FiscalYearID.Invoke(
                Connection, Transaction, tbaParam, securityTicket).Result.Single().ACC_BOK_BookingAccount_RefID;

            #endregion

            #region 3. Create one transaction and multiple booking lines

            var transactionParam = new CL3_BookingAccounts.Complex.Manipulation.P_L3BA_CATwBL_1315
            {
                AccountingTransactionTypeID = Guid.Empty,
                CurrencyID        = billHeader.Currency_RefID,
                DateOfTransaction = DateTime.Now
            };

            var bookingLines = new List <CL3_BookingAccounts.Complex.Manipulation.P_L3BA_CATwBL_1315a>();
            CL3_BookingAccounts.Complex.Manipulation.P_L3BA_CATwBL_1315a bookingLine = null;

            #region Booking line for customer account

            bookingLine = new CL3_BookingAccounts.Complex.Manipulation.P_L3BA_CATwBL_1315a()
            {
                BookingAccountID = customerBookingAccountID,
                // Debtor account: Dunning fee is booked as receivable with negative sign
                TransactionValue = -1 * Parameter.DunningFee
            };
            bookingLines.Add(bookingLine);

            #endregion

            #region Booking line for tenant's "other income" account

            bookingLine = new CL3_BookingAccounts.Complex.Manipulation.P_L3BA_CATwBL_1315a
            {
                BookingAccountID = otherIncomeAccountID,
                // "Other income account" Dunning Fee is booked with positive sign
                TransactionValue = Parameter.DunningFee
            };
            bookingLines.Add(bookingLine);

            #endregion

            transactionParam.BookingLines = bookingLines.ToArray();

            Guid accountTransactionID = CL3_BookingAccounts.Complex.Manipulation.cls_Create_Accounting_Transaction_with_BookingLines.Invoke(
                Connection, Transaction, transactionParam, securityTicket).Result;

            #endregion

            returnValue.Result = accountTransactionID;

            return(returnValue);

            #endregion UserCode
        }
 ///<summary>
 /// Invokes the method for the given Connection, and Transaction, leaving them open/not commited if no exceptions occured
 ///<summary>
 public static FR_Guid Invoke(DbConnection Connection, DbTransaction Transaction, P_L3PY_CATfDF_0849 Parameter, CSV2Core.SessionSecurity.SessionSecurityTicket securityTicket = null)
 {
     return(Invoke(Connection, Transaction, null, Parameter, securityTicket));
 }
        ///<summary>
        /// Method Invocation of wrapper classes
        ///<summary>
        protected static FR_Guid Invoke(DbConnection Connection, DbTransaction Transaction, string ConnectionString, P_L3PY_CATfDF_0849 Parameter, CSV2Core.SessionSecurity.SessionSecurityTicket securityTicket = null)
        {
            bool cleanupConnection  = Connection == null;
            bool cleanupTransaction = Transaction == null;

            FR_Guid functionReturn = new FR_Guid();

            try
            {
                if (cleanupConnection == true)
                {
                    Connection = CSV2Core_MySQL.Support.DBSQLSupport.CreateConnection(ConnectionString);
                    Connection.Open();
                }
                if (cleanupTransaction == true)
                {
                    Transaction = Connection.BeginTransaction();
                }

                functionReturn = Execute(Connection, Transaction, Parameter, securityTicket);

                #region Cleanup Connection/Transaction
                //Commit the transaction
                if (cleanupTransaction == true)
                {
                    Transaction.Commit();
                }
                //Close the connection
                if (cleanupConnection == true)
                {
                    Connection.Close();
                }
                #endregion
            }
            catch (Exception ex)
            {
                try
                {
                    if (cleanupTransaction == true && Transaction != null)
                    {
                        Transaction.Rollback();
                    }
                }
                catch { }

                try
                {
                    if (cleanupConnection == true && Connection != null)
                    {
                        Connection.Close();
                    }
                }
                catch { }

                throw new Exception("Exception occured in method cls_Create_AccountingTransaction_for_Dunning_Fee", ex);
            }
            return(functionReturn);
        }
 ///<summary>
 /// Opens the connection/transaction for the given connectionString, and closes them when complete
 ///<summary>
 public static FR_Guid Invoke(string ConnectionString, P_L3PY_CATfDF_0849 Parameter, CSV2Core.SessionSecurity.SessionSecurityTicket securityTicket = null)
 {
     return(Invoke(null, null, ConnectionString, Parameter, securityTicket));
 }