public void SendText(string senderId, string channelName, string messageText, string messageType)
{
Entity entity = new Entity ();
entity.id = "chatmessage";
ChatMessage chatMessage = new ChatMessage ();
ChatChannel chatChannel = new ChatChannel ();
chatChannel.name = channelName;
chatMessage.chatChannel = chatChannel;
chatMessage.message = messageText;
chatMessage.type = messageType;
chatMessage.senderId = senderId;
entity.chatMessage = chatMessage;
actorSystem.FindRemote ("default").Tell (entity);
}