exception.cs

// In MainActivity
protected override void OnCreate(Bundle bundle)
{
    base.OnCreate(bundle);  

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

    Xamarin.Forms.Forms.Init(this, bundle);  

    var app = new App();  
    LoadApplication(app);
}  

private static void CurrentDomainOnUnhandledException(object sender, UnhandledExceptionEventArgs unhandledExceptionEventArgs)
{
   
    try
    {
        // (unhandledExceptionEventArgs.ExceptionObject as Exception).ToExceptionless.Submit();// or whatever it is
    }
    catch
    {
        // just suppress any error logging exceptions
    }
}