using (var connection = new FbConnection(aConnectionString))
            {
                var cmd = new FbCommand(aSQL, connection);
                connection.Open();
                return cmd.ExecuteNonQuery();
            }

        private static void ExecuteNonQuery(FbCommand[] aCommand)
        {            
                using (var connection_ = new FbConnection(сonnectionString))
                {
                    connection_.Open();
                    var trans = connection_.BeginTransaction();
                    try
                    {
                        foreach (var command in aCommand)
                        {
                            command.Connection = connection_;
                            command.Transaction = trans;
                        }
                        trans.Commit();
                    }
                    catch (FbException e)
                    {
                        // Либо повторить обновление данных заново, либо откат транзакции
                        trans.Rollback();
                    }
                }
        }