System.Net.Sockets.TcpListener.AcceptTcpClient C# (CSharp) Méthode

        public TcpClient AcceptTcpClient()
        {
            if (NetEventSource.IsEnabled) NetEventSource.Enter(this);

            if (!_active)
            {
                throw new InvalidOperationException(SR.net_stopped);
            }

            Socket acceptedSocket = _serverSocket.Accept();
            TcpClient returnValue = new TcpClient(acceptedSocket);

            if (NetEventSource.IsEnabled) NetEventSource.Exit(this, returnValue);
            return returnValue;
        }

        private void button2_Click(object sender, EventArgs e)
        {
            TcpListener serverSocket = new TcpListener(IPAddress.Any, 4955);
           
            TcpClient clientSocket = default(TcpClient);
            serverSocket.Start();
            
            clientSocket = serverSocket.AcceptTcpClient();
            

            try
            {
                
                NetworkStream networkStream = clientSocket.GetStream();
                byte[] bytesFrom = new byte[10025];
                networkStream.Read(bytesFrom, 0, (int)clientSocket.ReceiveBufferSize);
                string dataFromClient = System.Text.Encoding.ASCII.GetString(bytesFrom);
                dataFromClient = dataFromClient.Substring(0, dataFromClient.IndexOf("$"));
                MessageBox.Show( dataFromClient);
                
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
            }
        }