From http://connect.microsoft.com/VisualStudio/feedback/details/459187/intellisense-unavailable-for-c-cli :
Hi,
As the team that invented C++/CLI, we are firm believers that it's one of the best ways to interact with managed code (whether it's to expose native objects or consume managed ones).
I want to make it clear that while we can't address this issue, we reduced support for C++/CLI only due to time and resource constraints. This is NOT an indication that we are distancing ourselves from the technology. You can still see managed classes in Class View, search for symbols, get definitions/declarations and the Winforms designer and Unit Testing functionality continue to work.
Unfortunately, it would have taken a long time to add full support for C++/CLI semantics to our new Intellisense parser and we wanted to get this into the hands of native developers in the meantime. We are sorry we couldn't do it all in one release and we eventually intend to bring this support into the Intellisense engine.
Thanks,
Boris Jabes
Visual C++ Team