private void Next_Clicked(object sender, EventArgs e) { Console.WriteLine(!selectedGenre.Any()); Console.WriteLine(selectedGenre.Count()); if (selectedGenre.Count() == 0) { DisplayAlert("Alert!", "No Genre Selected", "Dismiss"); return; } String selectedGenreString = "\""; selectedGenreString += String.Join("\",\"", selectedGenre); selectedGenreString += "\""; Preferences.Set("selectedGenre", selectedGenreString); Navigation.PushAsync(new GenrePage()); NetworkCalls networkcall = new NetworkCalls(); networkcall.saveUserPreferences(assignment1.Properties["token"].ToString(), assignment1.Properties["username"].ToString(), selectedGenreString); DisplayAlert("", "Your preferences have been synchronized", "Proceed"); }