I recently upgraded Xamarin.Studio and the iOS framework to the current Beta channel and also went through an XCode upgrade and an iOS SDK upgrade (6.1). Unfortunately one of my key projects broke (it's an XNA game that was running perfectly on multiple platforms prior to these upgrades).
Now, on build, I get an error on the first reference of System.Func<>. The error claims to be due to the fact that I reference System.Core 2.0.5.0 (which I do) and (per the title of this thread) I should reference 3.5.0.0. How do I change this reference? I don't see 3.5 as an option in my references dialog? Not sure how to move forward with this project or if the error message is even pointing me in the right direction. I am now unable to even us the Xamarin.Studio upgrade tool to change to a different build/channel as it gives me an error trying to connect or change anything.
Any ideas? Is there a System.Core build for version 3.5.0.0? Does this version indication something else is wrong? I have the same code but different solution files building for Windows, Win8, and Android.