Xamarin.iOS Register Push Notification with SDK 10

xamios-push.cs

if (UIDevice.CurrentDevice.CheckSystemVersion(10, 0))
{
    var center = UNUserNotificationCenter.Current;
    center.RequestAuthorization(UNAuthorizationOptions.Sound | UNAuthorizationOptions.Alert | UNAuthorizationOptions.Badge, (bool arg1, NSError error) => 
    {
        InvokeOnMainThread(() => 
        {
            if (error == null)
            {
                UIApplication.SharedApplication.RegisterForRemoteNotifications();
            }
            else
            {
                System.Diagnostics.Debug.WriteLine("center.RequestAuthorization ERROR");
                System.Diagnostics.Debug.WriteLine(error);
            }	
        });
    });
}
else if (UIDevice.CurrentDevice.CheckSystemVersion(8, 0))
{
    var pushSettings = UIUserNotificationSettings.GetSettingsForTypes(
                        UIUserNotificationType.Alert | UIUserNotificationType.Badge | UIUserNotificationType.Sound,
                        new Foundation.NSSet());

    UIApplication.SharedApplication.RegisterUserNotificationSettings(pushSettings);
    UIApplication.SharedApplication.RegisterForRemoteNotifications();
}
else {
    UIRemoteNotificationType notificationTypes = UIRemoteNotificationType.Alert | UIRemoteNotificationType.Badge | UIRemoteNotificationType.Sound;
    UIApplication.SharedApplication.RegisterForRemoteNotificationTypes(notificationTypes);
}