address to upload a file in a S# bucket

I use the following sintax in my routines in c# to upload a file in a server ( the same that host the web site) by my asp.net web site ( C#) string fileName = Path.Combine(HttpContext.Current.Server.MapPath("~"), String.Format(@"Folder{0}.bin", Register Id))

The Path.Combine(HttpContext.Current.Server.MapPath("~") give the way to access the correct folder (ex c:) In the amazon should be s3://bucket? what is the correct sintax? best regards

Paulo Cavalcanti