Troubleshooting tips for iOS 11 and Xamarin.iOS
Use the following resources to resolve issues while using Xamarin with iOS 11:
Known Issues and Troubleshooting
If you think you have found a bug in Xamarin.iOS, report the issue on GitHub.
Forums and StackOverflow
For answers to specific questions about using or implementing a specific iOS 11 feature in Xamarin.iOS, the Xamarin iOS Forum provides a wealth of information. StackOverflow is another good source of users-helping-users information.