DotNet: Using Sockets in C#

• Using TcpListener for creating a TCP server:

using System;
using System.Threading;
using System.Net;
using System.Net.Sockets;
using System.IO;
private Socket connection; // Socket for accepting a connection
private Thread readThread; // Thread for processing incoming messages
private NetworkStream socketStream; // network data stream
private BinaryWriter writer; // facilitates writing to the stream
private BinaryReader reader; // facilitates reading from the stream
readThread = new Thread( new ThreadStart( RunServer ) );
readThread.Start();
public void RunServer()
{

TcpListener listener; 

// Step 1: create TcpListenerIPAddress local = IPAddress.Parse( "127.0.0.1" );listener = new TcpListener( local, 50000 ); 

// Step 2: TcpListener waits for connection requestlistener.Start(); 

// Step 3: establish connection upon client requestwhile ( true ){

// accept an incoming connectionconnection = listener.AcceptSocket(); 

// create NetworkStream object associated with socketsocketStream = new NetworkStream( connection ); 

// create objects for transferring data across streamwriter = new BinaryWriter( socketStream );reader = new BinaryReader( socketStream ); 

// Step 4: read string data sent from client 

// Step 5: close connectionwriter.Close();reader.Close();socketStream.Close();connection.Close();

}

}