Created attachment 14380 [details]
The attached project contains an error related to inconsistent accessibility with the types. However, it's not detected on Mac in Xamarin Studio and compiles OK.
**Steps to Reproduce:**
1. Build the attached project in XS on Mac.
Build should error like this: http://screencast.com/t/aphzc1PXdZ
**Build Date & Platform:**
The attached project fails as expected in XS on Windows and in Visual Studio.
this is mcs.exe bug, btw XS 6.0(next cycle) is displaying this correctly as error, but mcs.exe still compiles
Fixed in master