How to upload files and encrypt in FTP server

Question

I have written below code to copy file from local system to ftp server , similarly i need to select multiple files and upload them in server . While i upload the files it should be converted as encrypted files, any suggestions, i have written code for encryption also.

public class WebRequestGetExample
{
public static void Main ()
{
// Get the object used to communicate with the server.
FtpWebRequest request = (FtpWebRequest)WebRequest.Create("ftp://192.1....../ftp.txt"); request.Method =WebRequestMethods.Ftp.UploadFile;
// This example assumes the FTP site uses anonymous logon.
request.Credentials = new NetworkCredential("username", "password");
// Copy the contents of the file to the request stream.
byte[] fileContents;
using (StreamReader sourceStream = new StreamReader("E:\\Anusha\\ftp.txt"))
{
fileContents = Encoding.UTF8.GetBytes(sourceStream.ReadToEnd());
}
request.ContentLength = fileContents.Length;
using (Stream requestStream = request.GetRequestStream())
{
requestStream.Write(fileContents, 0, fileContents.Length);
}
using (FtpWebResponse response = (FtpWebResponse)request.GetResponse())
{
Console.WriteLine("Upload File Complete, status {0}", response.StatusDescription);
}
}
}