no need of any change in code, it is server based change. look at my article here

http://www.c-sharpcorner.com/UploadFile/abhikumarvatsa/7460/?ArticleID=0e543b18-f6cb-4ec0-a8e8-6ab0aff937fc

hi thanks frnd for ur reply

Can u help me how to configure asp.net website to ssl port..
when i tried  it using self signed certificate shows error that "object not found"
by default the default website hold ssl port as 443.so when i create new website and assign the ssl port 443 it shows error...so i used 8443 as ssl port .. and while browsing the website in the IIS it shows this error..how to rectify?

can u help me on this........

Object not found!

The requested URL was not found on this server. If you entered the URL manually please check your spelling and try again.
If you think this is a server error, please contact the webmaster.

Error 404

localhost
6/7/2011 3:51:39 PM
Apache/2.2.12 (Win32) DAV/2 mod_ssl/2.2.12 OpenSSL/0.9.8k mod_autoindex_color PHP/5.3.0 mod_perl/2.0.4 Perl/v5.10.0

If you are having a domain and if you have buyed any SSL certificates you can host them to the website

In code you have to write the following in page_init

 if (!Request.IsSecureConnection)
        {
            Response.Redirect(Request.Url.AbsoluteUri.ToLower().Replace("http://", "https://"), true);
        }

and also add the following code in Page_Load

bool test = Request.IsSecureConnection;
        if (!test)
        {
            Uri strQueryString = HttpContext.Current.Request.Url;
            UriBuilder builder = new UriBuilder(strQueryString);
            builder.Scheme = Uri.UriSchemeHttps;
            builder.Port = 443;
            Server.Transfer(builder.Uri.ToString());
        }