System.Data.SqlClient.SqlTransaction.Rollback C# (CSharp) Method

        public void Rollback(string transactionName)
        {
            Exception e = null;
            Guid operationId = s_diagnosticListener.WriteTransactionRollbackBefore(_isolationLevel, _connection, transactionName);

            ZombieCheck();

            SqlStatistics statistics = null;
            try
            {
                statistics = SqlStatistics.StartTimer(Statistics);

                _isFromAPI = true;

                _internalTransaction.Rollback(transactionName);
            }
            catch (Exception ex)
            {
                e = ex;
                throw;
            }
            finally
            {
                if (e != null)
                {
                    s_diagnosticListener.WriteTransactionRollbackError(operationId, _isolationLevel, _connection, transactionName, e);
                }
                else
                {
                    s_diagnosticListener.WriteTransactionRollbackAfter(operationId, _isolationLevel, _connection, transactionName);
                }

                _isFromAPI = false;

                SqlStatistics.StopTimer(statistics);
            }
        }

        public System.Data.SqlClient.SqlTransaction SaveTruck(GINTruckInfo truck, System.Data.SqlClient.SqlTransaction transaction)
        {
            IGINProcess originalGIN = new GINProcessBLL(currentGINProcess.GINProcessInformation.TransactionId);

            currentGINProcess.SaveTruck(truck, transaction);
            //ConfirmNoConcurrency(Truck, Load, Weight)
            var truckChanges = (from oTruck in originalGIN.GINProcessInformation.Trucks
                                where oTruck.TruckId == truck.TruckId
                                select new object[] { oTruck, truck, AuditTrailWrapper.ExistingRecord });

            try
            {
                AuditTrailWrapper atw = new AuditTrailWrapper(AuditTrailWrapper.TruckRegistration, truckChanges.ToArray(), "GIN Process");
                if (!atw.Save())
                {
                    transaction.Rollback();
                    throw new Exception("Failed to save audit trail!");
                }
            }
            catch (Exception ex)
            {
                transaction.Rollback();
                throw ex;
            }
            return(transaction);
        }