I can send random numbers to clients but how can I store these random numbers at clients and send received message to server

public static void SendCallingNumber(string Message)
        {
            StreamWriter swSenderSender;
            // Create an array of TCP clients, the size of the number of users we have
            TcpClient[] tcpClients = new TcpClient[ServerController.htUsers.Count];
            // Copy the TcpClient objects into the array
            ServerController.htUsers.Values.CopyTo(tcpClients, 0);
            // Loop through the list of TCP clients
            for (int i = 0; i < tcpClients.Length; i++)
            {
                // Try sending a message to each
                try
                {
                    // If the message is blank or the connection is null, break out
                    if (Message.Trim() == "" || tcpClients[i] == null)
                    {
                        continue;
                    }
                    // Send the message to the current user in the loop
                    swSenderSender = new StreamWriter(tcpClients[i].GetStream());
                    swSenderSender.WriteLine(Message+" is calling number");
                    swSenderSender.Flush();
                    swSenderSender = null;
                    
                }
                catch // If there was a problem, the user is not there anymore, remove him
                {
                    RemoveUser(tcpClients[i]);
                }
            }
        }

ArrayList numbers= new ArrayList();
private void btnConnect_Click(object sender, EventArgs e)
 {
     // If we are not currently connected but awaiting to connect
     if (Connected == false)
     {
         // Initialize the connection
         ipAddr = IPAddress.Parse(txtIP.Text);
         tcpServer = new TcpClient();
         tcpServer.Connect(ipAddr, 1986);
         Connected = true;
         UserName = txtUsername.Text;
         btnConnect.Text = "Disconnect";
         SendMessage(txtUsername.Text);
         thrMessaging = new Thread(new ThreadStart(ReceiveMessages));
         thrMessaging.Start();
     }
     else
     {
         CloseConnection("Disconnected at user's request.");
     }
 }
 private void SendMessage(string message)
 {
     swSender = new StreamWriter(tcpServer.GetStream());
     swSender.WriteLine(message);
     swSender.Flush();
 }
 private void ReceiveMessages()
 {
     srReceiver = new StreamReader(tcpServer.GetStream());
     string strReceive = srReceiver.ReadLine();
     if (strReceive[0] == '1')
     {
         this.Invoke(new UpdateLogCallback(this.UpdateLog), new object[] { "Connected Successfully!" });
     }
     else
     {
         string Reason = "Not Connected: ";
         Reason += strReceive.Substring(2, strReceive.Length - 2);
         this.Invoke(new CloseConnectionCallback(this.CloseConnection), new object[] { Reason });
         return;
     }
     while (Connected)// I think problem is here
     {
         this.Invoke(new UpdateLogCallback(this.UpdateLog), new object[] { srReceiver.ReadLine() });
         numbers.Add(srReceiver.ReadLine().Substring(0,2));//This code will make a latency in client
       // if server send a random numbers, client cannot receive
         SendMessage("Already received random numbers");// This code will send back many same message to server.


     }
 private void UpdateLog(string strMessage)
 {
     // Append text also scrolls the TextBox to the bottom each time
     txtContent.AppendText(strMessage + "\r\n");
 }