/// <summary>
        /// Close the link between Client e Server.
        /// </summary>
        protected internal void Stop()
        {
            if (_client != null)
            {
                _server.RaiseClientBeforeDisconnectedEvent(this);

                tr.Close();
                tw.Close();

                _client.Close();
                _client = null;

                lock (_server.Clients)
                {
                    _server.Clients.Remove(this);
                }

                _server.RaiseClientAfterDisconnectedEvent(this);
            }
        }