Learn MS .NET

I was brought in to work on an asp.net web site recently that had been written by another company.  I was asked to add some features to their current site as well as to fix some bugs that had been left by the previous developers.  Once I had the site ready I moved this web site project to my staging server and then started receiving this error on a couple of pages.  Now I had chosen to publish the website instead of just doing a copy of the site with the code-behind files as well.  This is when this problem started.

I did some searching on the web and came up with the following that the class I had on these pages were duplicates on other pages or other compiled dlls within the published site.  So I started looking for the pages that had the offending classes and I discovered them within the web site.  I wish I had the time to move this web site into a web application project to avoid these issues.  More information can be found here as well.