Наследование: RedisMessage
        internal void WriteMessage(ref int db, RedisMessage next, IList <QueuedMessage> queued)
        {
            if (next.Db >= 0)
            {
                if (db != next.Db)
                {
                    db = next.Db;
                    RedisMessage changeDb = RedisMessage.Create(db, RedisLiteral.SELECT, db).ExpectOk().Critical();
                    if (queued != null)
                    {
                        queued.Add((QueuedMessage)(changeDb = new QueuedMessage(changeDb)));
                    }
                    RecordSent(changeDb);
                    changeDb.Write(outBuffer);
                    Interlocked.Increment(ref messagesSent);
                }
                LogUsage(db);
            }

            if (next.Command == RedisLiteral.SELECT)
            {
                // dealt with above; no need to send SELECT, SELECT
            }
            else
            {
                var          mm  = next as IMultiMessage;
                RedisMessage tmp = next;
                if (queued != null)
                {
                    if (mm != null)
                    {
                        throw new InvalidOperationException(
                                  "Cannot perform composite operations (such as transactions) inside transactions");
                    }
                    queued.Add((QueuedMessage)(tmp = new QueuedMessage(tmp)));
                }

                if (mm == null)
                {
                    RecordSent(tmp);
                    tmp.Write(outBuffer);
                    Interlocked.Increment(ref messagesSent);
                    switch (tmp.Command)
                    {
                    // scripts can change database
                    case RedisLiteral.EVAL:
                    case RedisLiteral.EVALSHA:
                    // transactions can be aborted without running the inner commands (SELECT) that have been written
                    case RedisLiteral.DISCARD:
                    case RedisLiteral.EXEC:
                        // we can't trust the current database; whack it
                        db = -1;
                        break;
                    }
                }
                else
                {
                    mm.Execute(this, ref db);
                }
            }
        }