CQRS_ES.Framework.SqlEventStore.StoreEvents C# (CSharp) Метод

        public void StoreEvents(object streamId, IEnumerable<object> events, long expectedInitialVersion)
        {
            events = events.ToArray();

            var connectionString = ConfigurationManager.ConnectionStrings["main"].ConnectionString;
            var serializedEvents =
                events.Select(x => new Tuple<string, string>(x.GetType().FullName, JsonConvert.SerializeObject(x)));

            using (var connection = new SqlCeConnection(connectionString))
            {
                connection.Open();

                const string commandText = "SELECT TOP 1 CurrentSequence FROM Streams WHERE StreamId = @StreamId;";
                long? existingSequence;
                using (var command = new SqlCeCommand(commandText, connection))
                {
                    command.Parameters.AddWithValue("StreamId", streamId.ToString());
                    var current = command.ExecuteScalar();
                    existingSequence = current == null ? (long?) null : (long) current;

                    if (existingSequence != null && ((long) existingSequence) > expectedInitialVersion)
                        throw new ConcurrencyException();
                }

                using (var transaction = new TransactionScope())
                {
                    var nextVersion = InsertEventsAndReturnLastVersion(streamId, connection, expectedInitialVersion,
                                                                       serializedEvents);
                    if(existingSequence == null)
                        StartNewSequence(streamId, nextVersion, connection);
                    else
                    {
                        UpdateSequence(streamId, expectedInitialVersion, nextVersion, connection);
                    }
                    transaction.Complete();
                }
            }

            _bus.Publish(events);
        }