using System; 
 using System.Net; 
 using System.Net.Sockets; 
 using System.IO; 
 using System.Text; 
  
 namespace FileSender 
 { 
     public static class FileSender 
     { 
         private const int BufferSize = 1024; 
  
         public static void Send(IPEndPoint ip, string path) 
         { 
             Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); 
             sock.Connect(ip); 
             using (FileStream reader = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.None)) 
             { 
                 long send = 0L, length = reader.Length; 
                 sock.Send(BitConverter.GetBytes(length)); 
                 string fileName = Path.GetFileName(path); 
                 sock.Send(Encoding.Default.GetBytes(fileName)); 
                 Console.WriteLine("Sending file:" + fileName + ".Plz wait..."); 
                 byte[] buffer = new byte[BufferSize]; 
                 int read, sent; 
                 //断点发送 在这里判断设置reader.Position即可 
                 while ((read = reader.Read(buffer, 0, BufferSize)) != 0) 
                 { 
                     sent = 0; 
                     while ((sent += sock.Send(buffer, sent, read, SocketFlags.None))  < read) 
                     { 
                         send += (long)sent; 
                         //Console.WriteLine("Sent " + send + "/" + length + ".");//进度 
                     } 
                 } 
                 Console.WriteLine("Send finish."); 
             } 
         } 
  
         public static void Receive(IPEndPoint ip, string path) 
         { 
             Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); 
             sock.Bind(ip); 
             sock.Listen(1); 
             Socket client = sock.Accept(); 
             byte[] buffer = new byte[BufferSize]; 
             client.Receive(buffer); 
             long receive = 0L, length = BitConverter.ToInt64(buffer, 0); 
             string fileName = Encoding.Default.GetString(buffer, 0, client.Receive(buffer)); 
             Console.WriteLine("Receiveing file:" + fileName + ".Plz wait..."); 
             using (FileStream writ