//Show all restaurant name and location void showAll() { List <Restaurant> restaurantList; RestaurantService restaurantService = new RestaurantService(); restaurantList = restaurantService.GetAllSearchList(); listBox1.Items.Clear(); foreach (var item in restaurantList) { string listItem = string.Format("{0}-{1}", item.Name, item.Location); listBox1.Items.Add(listItem); } }