//GetBusinessCategories()-->gets a list of all Business Categories based of a single business
 public List <String> GetBusinessCategories(String id)
 {
     try
     {
         List <String> categories = PostgreSQLQueries.GetBusinessCategory(id);
         return(categories);
     }
     catch (Exception e)
     {
         Console.WriteLine(e);
         throw;
     }
 }
 //GetBusinessCategories()-->gets a list of all Business Categories based of given state, city and zipcode
 public List <ListBoxItem> GetBusinessCategories(State state, City city, String zipcode)
 {
     try
     {
         List <ListBoxItem> categories = PostgreSQLQueries.GetBusinessCategory(zipcode, city, state);
         return(categories);
     }
     catch (Exception e)
     {
         Console.WriteLine(e);
         throw;
     }
 }