How to programmatically c# change ftp user's password

Question

HOW TO PROGRAMMATICALLY C# CHANGE FTP USER'S PASSWORD

 

this is for connectivy for FTP but i need futher change FTP Password :

 

FtpWebRequest request = (FtpWebRequest)WebRequest.Create("ftp://" + "xxx.te.com)";

request.Method = WebRequestMethods.Ftp.ListDirectoryDetails;

request.Credentials = new NetworkCredential(rackid, password);

request.GetResponse();

request.KeepAlive = true;

request.UseBinary = true;

request.UsePassive = true;

request.GetResponse();

 

Please any one help it.