program.cs

it bout file transfer this is about client and server

using System;
using System.Collections.Generic;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.IO;

namespace Client
{
    class Program
    {
        static StreamWriter writeImageData;
        static NetworkStream nStream;

        static string Base64ImageData;
        static string BlockData;
        static int RemainingStringLength = 0;

        static bool Done = false;
        static void Main(string[] args)
        {
            try
            {

                TcpClient tcpClient = new TcpClient("127.0.0.1", 5555);
                nStream = tcpClient.GetStream();
                writeImageData = new StreamWriter(nStream);


                //Change the filename here. If you change the file type, 
                //you must change it on the Server Project too.

                FileStream fs = File.OpenRead("logo.jpg");
                byte[] ImageData = new byte[fs.Length];
                fs.Read(ImageData, 0, ImageData.Length);

                Base64ImageData = Convert.ToBase64String(ImageData);

                int startIndex = 0;

                Console.WriteLine("Transfering Data...");

                while (Done == false)
                {
                    while (startIndex < Base64ImageData.Length)
                    {
                        try
                        {
                            BlockData = Base64ImageData.Substring(startIndex, 100);
                            writeImageData.WriteLine(BlockData);
                            writeImageData.Flush();
                            startIndex += 100;
                        }
                        catch (Exception er)
                        {
                            RemainingStringLength = Base64ImageData.Length - startIndex;
                            BlockData = Base64ImageData.Substring(startIndex, RemainingStringLength);
                            writeImageData.WriteLine(BlockData);
                            writeImageData.Flush();
                            Done = true;
                            break;
                        }
                    }
                }

                writeImageData.Close();
                tcpClient.Close();

                Console.WriteLine("Transfer Complete");
            }
            catch (Exception er)
            {
                Console.WriteLine("Unable to connect to server");
                Console.WriteLine(er.Message);
            }

            Console.ReadKey();
        }
    }
}