You've loaded a project, made your changes and then hit 'Run' and for whatever reason, this project that worked before, suddenly doesn't. Chances are it's been a while since you last opened this project, what does that matter? It shouldn't just break... But it has. Xamarin - It just works. Not.
There's no long winded answer with this one, just delete the bin and obj folders from your project and your all will compile successfully. Done.
By Luke Alderton at 3 Jan 2017, 16:50 PM