title: An error occurred in the requested FTP operation. FTP Service (FTP07) 503 Invalid sequence of commands (AUTH SSL/TLS required prior to authentication)
body: <p>Here is my code:     </p>
  
  <pre><code>FTPConnectionManager.Properties["ServerName"].SetValue(FTPConnectionManager, strFTPURL);
  FTPConnectionManager.Properties["ServerUserName"].SetValue(FTPConnectionManager, strUserName);
  FTPConnectionManager.Properties["ServerPassword"].SetValue(FTPConnectionManager, strPassword);
  FtpClientConnection ftp = new FtpClientConnection(FTPConnectionManager.AcquireConnection(null));
  ServicePointManager.SecurityProtocol = (SecurityProtocolType)3072 | (SecurityProtocolType)768; 
  ftp.Connect();
  ftp.SetWorkingDirectory(strFTPPendingPath);
  ftp.GetListing(out folderNames, out fileNames);
  //UnZipping FUnctionlity
  ftp.Close();
  </code></pre>
  
  <p>And i get </p>
  
  <blockquote>
    <p>FTP Service (FTP07) 503 Invalid sequence of commands (AUTH SSL/TLS
    required prior to authentication)</p>
  </blockquote>