A colleague just pulled down the latest changes but a portable core library I setup won't build, it complains that System.Linq is not known and VS says we're probably missing a library reference.
Under references of the Portable Library, the '.NET Portable Subset' reference is not listed. This is the only reference it should have so effectively my references are empty.
My colleague is running the latest Visual Studio 2012 like me. The '.NET Portable Subset' reference isn't a typical DLL so I can't add it on his machine - I guess something's up with his dev box.
Any help?
Short answer: Install VS 2012 Update 2 on both your machines.
Caveat: If you install VS 2012 Update 2 after the WP8 SDK, you will need to repair the Update 2 installation if you get errors about types in System.Net. See Issue 2 in this KB article
Explanation: The WP8 SDK added additional portable profiles (basically combinations of platforms you can target) which weren't included in VS2012 RTM. Those additional profiles were included in VS2012 Update 2 so you can install.