Akka.Actor.UnstartedCell.SendMessage C# (CSharp) Method

        private void SendMessage(object message, IActorRef sender)
        {
            if (Monitor.TryEnter(_lock, _timeout))
            {
                try
                {
                    var cell = _self.Underlying;
                    if (CellIsReady(cell))
                    {
                        cell.Post(sender, message);
                    }
                    else
                    {
                        _messageQueue.Add(new Envelope { Message = message, Sender = sender });
                        Mailbox.DebugPrint("{0} temp queueing {1} from {2}", Self, message, sender);
                    }
                }
                finally
                {
                    Monitor.Exit(_lock);
                }
            }
            else
            {
                _system.EventStream.Publish(new Warning(_self.Path.ToString(), GetType(), "Dropping message of type" + message.GetType() + " due to lock timeout"));
                _system.DeadLetters.Tell(new DeadLetter(message, sender, _self), sender);
            }
        }