Npgsql.NpgsqlTransactionCallbacks.RollbackTransaction C# (CSharp) Method

        public void RollbackTransaction()
        {
            NpgsqlEventLog.LogMethodEnter(LogLevel.Debug, CLASSNAME, "RollbackTransaction");
            NpgsqlConnection connection = GetConnection();

            if (_prepared)
            {
                NpgsqlCommand.ExecuteBlind(connection.Connector, string.Format("ROLLBACK PREPARED '{0}'", _txName));
            }
            else
            {
                NpgsqlCommand.ExecuteBlind(connection.Connector, "ROLLBACK");
            }
        }

 public void Rollback(SinglePhaseEnlistment singlePhaseEnlistment)
 {
     NpgsqlEventLog.LogMethodEnter(LogLevel.Debug, CLASSNAME, "Rollback");
     // try to rollback the transaction with either the
     // ADO.NET transaction or the callbacks that managed the
     // two phase commit transaction.
     if (_npgsqlTx != null)
     {
         _npgsqlTx.Rollback();
         _npgsqlTx.Dispose();
         _npgsqlTx = null;
         singlePhaseEnlistment.Aborted();
     }
     else if (_callbacks != null)
     {
         if (_rm != null)
         {
             _rm.RollbackWork(_callbacks.GetName());
             singlePhaseEnlistment.Aborted();
         }
         else
         {
             _callbacks.RollbackTransaction();
             singlePhaseEnlistment.Aborted();
         }
         _callbacks = null;
     }
     _inTransaction = false;
 }