private async void OnMoviesWatchedExecute()
        {
            if (SelectedMember != null)
            {
                SubscriptionsViewModel.Clear();

                SubscriptionViewModel subscriptionViewModel;
                foreach (var subscription in SelectedMember.Subscriptions)
                {
                    subscriptionViewModel = new SubscriptionViewModel();
                    Movie movie = null;
                    try
                    {
                        movie = await _movieRepository.GetByIdAsync(subscription.MovieId);
                    }
                    //TODO: A second operation started on this context before a previous operation completed.
                    // This is usually caused by different threads using the same instance of DbContext.
                    catch (Exception)
                    {
                    }
                    // TODO:Bug - add double watch date withou movie

                    if (movie == null)
                    {
                        continue;
                    }
                    subscriptionViewModel.Id          = subscription.Id;
                    subscriptionViewModel.Movie       = movie;
                    subscriptionViewModel.Member      = SelectedMember.Model;
                    subscriptionViewModel.WatchedDate = subscription.WatchedDate;
                    subscriptionViewModel.SelectedMovieDetailsCommand = new DelegateCommand <string>(OnSelectedMovieDetailsExecute);
                    SubscriptionsViewModel.Add(subscriptionViewModel);
                }
            }
        }
        private async void OnMembersWatchedExecute()
        {
            if (SelectedMovie != null)
            {
                SubscriptionsViewModel.Clear();
                SubscriptionViewModel subscriptionViewModel;
                foreach (var subscription in SelectedMovie.Subscriptions)
                {
                    subscriptionViewModel = new SubscriptionViewModel();
                    var member = await _memberRepository.GetByIdAsync(subscription.MemberId);

                    subscriptionViewModel.Id          = subscription.Id;
                    subscriptionViewModel.Movie       = SelectedMovie.Model;
                    subscriptionViewModel.Member      = member;
                    subscriptionViewModel.WatchedDate = subscription.WatchedDate;
                    subscriptionViewModel.SelectedMemberDetailsCommand = new DelegateCommand <string>(OnSelectedMemberDetailsExecute);
                    SubscriptionsViewModel.Add(subscriptionViewModel);
                }
            }
        }