Our team is developing a web application targeted to x64. All its project references and their dependencies are targeting x64 (I verified the .csproj files and the assemblies). There are no latebound references in configuration files.
Everything compiles and runs fine under IIS 8.x Express. Only when publishing do we see
invalid assembly platform or ContentType in file
in the Fusion log. This occurs during a run of aspnet_compiler.exe as part of the publish. It seems that indeed, there is some kind of processor architecture mismatch, but where?
I also checked the target framework and target profile. The web project's framework is .NET 4.5. All its dependencies are 4.5 or lower, and the profile is the non-client one.