How to download a file using HttpWebRequest from ftp through c#

Well that would not seem logical now would it? An FTP protocal request through a HTPP protocol request.

You could look into FtpWebRequest[]

The following code example demonstrates downloading a file from an FTP server by using the WebClient class.

public static bool DisplayFileFromServer(Uri serverUri)
{
   // The serverUri parameter should start with the ftp:// scheme.
   if (serverUri.Scheme != Uri.UriSchemeFtp)
   {
      return false;
   }

   // Get the object used to communicate with the server.
   WebClient request = new WebClient();
    
   // This example assumes the FTP site uses anonymous logon.
   request.Credentials = new NetworkCredential ("anonymous","janeDoe@contoso.com");

   try 
   {
      byte [] newFileData = request.DownloadData (serverUri.ToString());
      string fileString = System.Text.Encoding.UTF8.GetString(newFileData);
      Console.WriteLine(fileString);
   }
   catch (WebException e)
   {
      Console.WriteLine(e.ToString());
   }

   return true;
}