after installing vs 11 beta, i get a message like the following for each of my c# project that references a c++ project:
66>C:\Windows\Microsoft.NET\Framework\v4.0.30319\Microsoft.Common.Targets(1546,5): warning MSB3270: There was a mismatch between the processor architecture of the project being built "MSIL" and the processor architecture of the reference "C:\Statik\kernel\managed\kernel.managed.calculations.profiles\DebugX64\kernel.managed.calculations.profiles.dll", "AMD64". This mismatch may cause runtime failures. Please consider changing the targeted processor architecture of your project through the Configuration Manager so as to align the processor architectures between your project and references, or take a dependency on references with a processor architecture that matches the targeted processor architecture of your project.
there a so many of these messages, that the error list becomes unusable. i have no idea what vs is trying to tell me, however, the resulting code runs just fine (as it has for several years now). i also noted that i receive the same warning in vs 2010 builds - _after_ i installed vs 11 beta. (thus i assume this is something out of the "updated" msbuild for net 4.5. but i'm just guessing...)