Remove ios, windows8, and wp8 from Xamarin Forms PCL – nuget 3.0 opt-into error?
The solution that worked for me: Uninstall Xamarin.Forms: Right Click Solution -> Manage NuGet Packages -> Uninstall Xamarin.Forms -> Restart VS Then remove build platforms: Right Click Solution -> Properties -> Build -> under Targeting select Change -> Remove platform(s) -> Restart VS Reinstall Xamarin.Forms: Manage NuGet packages -> Search for Xamarin.Forms -> Install -> … Read more