public void AddUserToChat(string username)
        {
            var chatClient          = new MessageParserClient(username, this);
            var chatForm            = new ChatForm(this, directoryMonitor.GetUsers(), username);
            var clientMessageParser = new MessageParserClient(username, this);
            var chatChannel         = new ChatChannel(username, clientMessageParser);

            chatClients.Add(username, new Tuple <IChatUi, ChatChannel>(chatForm, chatChannel));
            directoryMonitor.AddChatUi(chatForm);
        }