I was messing with porting my Windows Phone XNA game to iOS. I created a project in Xamarin Studio using the template add-in by stebyrne04(MonoGame Addin for Xamarin Studio 4), then linked my source files and content, referenced MonoGame.Framework.iOS, MonoGame.Framework.Net.iOS and Lindgren.Network.iOS. I tried building the project, and some errors popped up. It seems that the namespaces below are not available on iOS: