.net sockets login server

Hi guys/Gals i have a small problem i can kinda work around but would much prefer a better solution at the moment i'm using a new thread for checking my received data from server but this is not good enough has i cant use a separate thread to call anything on the main thread.

the code works but i know it is not the best way to handle this, as unity uses its own loop for the update i am unable to check a while loop for this data as it locks the application and freezes, so thats why i chose to use a background thread for the receiving data. but it gives issues if the server is not running before i open the client. any tips to get the receive method working without a new thread would be most ideal.

  void Start()
     {
        // Connect();
        //Start a recieve Thread
         Thread t;
         t = new Thread(new ThreadStart(readMessages));
         t.Start();   
     }


 void readMessages()
     {
        print("read Message Thread Started.");
         while (true)
         {
             try
             {
                     byte[] recBuffer = new byte[1024];
                     int rec = login.client.Receive(recBuffer);
 
                     if (rec != 0)
                         print("recieved " + rec + " bytes");
 
                     byte[] data = new byte[rec];
                     Array.Copy(recBuffer, data, rec);
                     print("Received: " + Encoding.ASCII.GetString(data));                
                 
             }
             catch { }
         }
     }
 

Thanks in advance for anyone willing to help with this issue.