C#

m_prx = new ProxyServer(this);
System.Threading.Thread proxythread = new System.Threading.Thread(new ThreadStart(m_prx.Start));
proxythread.Start();

 m_listener.Start();
System.Diagnostics.Debug.WriteLine("Listening socket on port " + m_port);

while (true)
{
    HttpListenerContext request = m_listener.GetContext();
    ThreadPool.QueueUserWorkItem(ProcessRequest, request);

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(address);
//create cache object
request.Credentials = AddCache(uri);
request.ClientCertificates.Add(SisService.GetClientCertificate());

buffer = new byte[BUFFER_SIZE];
Stream instream = context.Request.InputStream;
int incount = instream.Read(buffer, 0, buffer.Length);
while (incount > 0)
{
    request.GetRequestStream().Write(buffer, 0, incount);
    incount = instream.Read(buffer, 0, buffer.Length);
}
// Wait for Response
WebResponse response = request.GetResponse();

// Transfer the body data from the WebResponse
buffer = new byte[BUFFER_SIZE];
Stream outstream = response.GetResponseStream();
int outcount = outstream.Read(buffer, 0, buffer.Length);
while (outcount > 0)
{
    context.Response.OutputStream.Write(buffer, 0, outcount);
    outcount = outstream.Read(buffer, 0, buffer.Length);
}
// Close streams
instream.Close();
outstream.Close();
context.Response.OutputStream.Close();

A first chance exception of type 'System.Net.HttpListenerException' occurred in System.dll
An operation was attempted on a nonexistent network connection

TcpListener listener = new TcpListener(IPAddress.Any, m_port);
listener.Start();

DoBeginAcceptSocket(listener);

public static void DoBeginAcceptSocket(TcpListener listener)
{
    // Set the event to nonsignaled state.
    tcpClientConnected.Reset();

    // Start to listen for connections from a client.
    //Console.WriteLine("Waiting for a connection...");

    // Accept the connection.
    // BeginAcceptSocket() creates the accepted socket.
    listener.BeginAcceptSocket(
        new AsyncCallback(ProcessSocket), listener);
    // Wait until a connection is made and processed before
    // continuing.
    tcpClientConnected.WaitOne();
}

A first chance exception of type 'System.Net.Sockets.SocketException' occurred in System.dll
An existing connection was forcibly closed by the remote host.