更新到此版本的xamarin.ios时，出现另一个错误，我已通过使用Rolf提供的命令行工具更新dlls Facebook.dll、flurry.dll解决了该错误。现在应用程序出现以下错误。请对此提供一些解决方案，并想知道如何更新框架的dll，例如monotouch.dll。
错误是，1） /Users/volgainfotech/Projects/ScrapBoom/Kiln/ScrapBoom-Stable/ScrapBoom.iPhone/ScrapBoom.iPhone/Screens/iPhone/AddDocument/ImageCroppingScreen.cs(38,38): Error CS0012: The type System.Drawing.Size' is defined in an assembly that is not referenced. Consider adding a reference to assembly monotouch, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' (CS0012) (ScrapBoom.iPhone)
2） /Users/volgainfotech/Projects/ScrapBoom/Kiln/ScrapBoom-Stable/ScrapBoom.iPhone/ScrapBoom.iPhone/Screens/iPhone/AddDocument/ImageCroppingScreen.cs(14,14): Error CS0012: The type System.Drawing.PointF' is defined in an assembly that is not referenced. Consider adding a reference to assembly monotouch, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' (CS0012) (ScrapBoom.iPhone)
3） /Users/volgainfotech/Projects/ScrapBoom/Kiln/ScrapBoom-Stable/ScrapBoom.iPhone/ScrapBoom.iPhone/Screens/iPhone/AddDocument/ImageCroppingScreen.cs(30,30): Error CS0012: The type MonoTouch.UIKit.UIImage' is defined in an assembly that is not referenced. Consider adding a reference to assembly monotouch, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' (CS0012) (ScrapBoom.iPhone)
我也参考过这个论坛，http://forums.xamarin.com/discussion/1475/changes-to-assembly-strongnames-in-xamarin-ios-6-2-0
看起来你没有用我的工具更新所有引用（注意，你不应该更新monotouch.dll这样的平台程序集，只应该更新你自己或其他第三方程序集）。
发生错误的行可能使用了您忘记更新的此dll中的API。