I have a solution that has a number of Class Library assemblies and a
ASP.NET web site. On opening VS, all references work. After a change in
any one of the Class Library assemblies, any reference to the changed
classes are no longer found on the web site.
Given assembly CL with class A which is used in the web site, on load all
references to CL.A work as expected. Change something in CL.A and rebuild
solution. All references to CL.A in the web site are marked as "Cannot
resolve symbol A.".