C#

public void download(string remFileName, string locFileName, Boolean resume)
       {
           if (!logined)
           {
               login();
           }

           setBinaryMode(true);
           Console.WriteLine("Downloading file " + remFileName + " from " + remoteHost + "/" + remotePath);
           ftpLog("Downloading file " + remFileName + " from " + remoteHost + "/" + remotePath);

           if (locFileName.Equals(""))
           {
               locFileName = remFileName;
           }

           if (!File.Exists(locFileName))
           {
               Stream st = File.Create(locFileName);
               st.Close();
           }

           FileStream output = new FileStream(locFileName, FileMode.Open);

           createDataSocket(true);
           if (dataSocket != null)
           {
               throw new Exception();
           }
           dataSocket = listeningSocket.Accept(); //###################
           listeningSocket.Close();
           listeningSocket = null;
           if (dataSocket == null)
           {
               throw new Exception("Winsock error: " +
                       Convert.ToString(System.Runtime.InteropServices.Marshal.GetLastWin32Error()));
           }

           sendCommand("RETR " + remFileName);

           if (!(retValue == 150 || retValue == 125))
           {
               throw new IOException(reply.Substring(4));
           }

           while (true)
           {
               bytes = dataSocket.Receive(buffer, buffer.Length, 0);
               output.Write(buffer, 0, bytes);

               if (bytes <= 0)
               {
                   break;
               }
           }

           output.Close();

           if (dataSocket.Connected)
           {
               dataSocket.Close();
           }

           Console.WriteLine("");

           readReply();

           if (!(retValue == 226 || retValue == 250))
           {
               throw new IOException(reply.Substring(4));
           }

       }

public class Base
    { 
        private string _caption = "parentresult";
        public virtual string Caption
        {
            get { return _caption; }
            set { _caption = value; }
        }
    }

    public class Child : Base
    {
        public override string Caption
        {
            get { return base.Caption; }
            set { base.Caption = value; }
        }
    }

public class Base {
   public string _Caption="parentresult";
}

public class Child : Base {
   public new string _Caption="childresult";
}