// Обработка подключенного клиента и регистрация пользователя private UserModel ConnectTcpClient(TcpClient tcpClient) { var ip = tcpClient.Client.RemoteEndPoint.ToString(); _infoWriter.Write(InfoType.Info, string.Concat(ChatConstants.Client, " ", ip, " ", ChatConstants.Connected)); _tcpClients.Add(tcpClient); var username = ChatLogic.GetUsernameFromTcpClient(tcpClient); if (string.IsNullOrEmpty(username)) { return(null); } var user = new UserModel() { Username = username, TcpClient = tcpClient }; if (ConnectUser(user) == false) { return(null); } return(user); }