private void OnReviewSubmitted(object sender, ReviewSubmittedEventArgs args)
 {
     if (this.Pivot.SelectedItem == this.Rate)
     {
         this.Pivot.SelectedItem = this.Details;
     }
 }
        private async void OnCurrentIdentityReviewSubmitted(object sender, ReviewSubmittedEventArgs args)
        {
            if (!string.IsNullOrEmpty(args.Review.Comment))
            {
                var existingReview = this.Reviews.FirstOrDefault(review => review.SubmittedBy == args.Review.SubmittedBy);
                this.Reviews.Remove(existingReview);

                this.Reviews.Insert(0, this.CreateReviewViewModel(args.Review));
            }

            var cafe = await this.GetCafe();
            this.Populate(cafe);
        }