I just discovered a solution to my earlier problem - as a reference to
anyone else that might experience a similar issue:


When I first created these 2 pages  - each page  referred to its own .aspx.cs
file. After I made my changes (manually) to merge the two code-behinds
together - I made sure that there were no longer references in my aspx  files
to old aspx.cs files. Even though there weren't references in the code,
VS.Net still held a reference to the code-behind  page which I merged
(bblist.aspx.cs). In the Solution Explorer, I had to click "Show all files"
and then delete the file reference to that page -- afterwards then the
solution would build  just fine  in VS.