private void ExecuteNavigateToLandingPageCommand()
        {
            // cancel selection
            if (ApplicationInstanceData.SelectedLocalization != null)
            {
                var query = Localizations.Where(a => a.Abbreviation == ApplicationInstanceData.SelectedLocalization.Abbreviation);
                if (query.Any())
                {
                    SelectedLocalization = query.First();
                }
                OnPropertyChanged(nameof(SelectedLocalization));
            }

            if (isFromMainMenu)
            {
                return;
            }

            Application.Current.MainPage = new LandingContentPage
            {
                BindingContext = new LandingContentPageModel(ApplicationInstanceData)
            };
        }