C# Sockets and Multithreading

Question

I am trying to learn more about sockets and threading in c#. I have come across a lot of good resources online to help get me started. The program I made so far, is a simple

Answer 1

After accepting the socket in the middle man I do the following:

 private void WaitForData()
    {
        try
        {
            if (socketReadCallBack == null)
            {
                socketReadCallBack = new AsyncCallback(OnDataReceived);
            }

            ReceiveState rState = new ReceiveState();
            rState.Client = mySocket;

            mySocket.BeginReceive(rState.Buffer, 0, rState.Buffer.Length, SocketFlags.None,
                new AsyncCallback(socketReadCallBack), rState);

        }
        catch (SocketException excpt)
        {
            // Process Exception
        }

    }

Receive State is:

public class ReceiveState
  {
    public byte[] Buffer = new byte[1024]; //buffer for network i/o
    public int DataSize = 0; //data size to be received by the server
    public bool DataSizeReceived = false; //whether prefix was received
    public MemoryStream Data = new MemoryStream(); //place where data is stored
    public Socket Client;   //client socket
   }

Once data is received my routine "OnDataReceived" processes it. I'm not experiencing any CPU problems with this.

Same code used for both the client and middleman.