public void SendFile()
{
   //循环发送
   foreach(IP地址 in 多台机器IP地址列表)
   {
      Socket.Connect(IP地址);
      FileStream.Read(要发送的文件);
      Socket.Send(FileStream To Bytes);
      Socket.close();
      FileStream.close();
   }
}
..............
//主程序中启动线程执行传输文件
Thread thread = new Thread(new ThreadStart(SendFile));
thread.Start();