Global Exception Handling

Hi Everyone. I'm in my final submission of my Xamarin forms App. I want to handle Exceptions Globally in my Project. I tried this https://peterno.wordpress.com/2015/04/15/unhandled-exception-handling-in-ios-and-android-with-xamarin/ but it's not working.

    AppDomain.CurrentDomain.UnhandledException += CurrentDomainOnUnhandledException;
        TaskScheduler.UnobservedTaskException += TaskSchedulerOnUnobservedTaskException;  

The above methods are not invoking when any exception raised. Any kind of help will be appreciated.