how to Upload/Download from a HTTPS server through C#

Question

I have read your article on connecting and downloading a file from HTTP and Proxy server through C#.NET. Currently i am working on an application that would upload and download files from a HTTPS server, without any proxy server between. but i cannot get through it. Somewhat using your code in the above article i get the message in the resultant string that "Virtual user logged in". I am kind of stuck in this scenario.
Could you kindly help me out of it.