StatesProvinces.cs

    public static class StatesProvinces
    {
         public static OrderedDictionary Dictionary
         {
             get
             {
                 return new OrderedDictionary
                            {
                                {"AL", "Alabama"},
                                {"AK", "Alaska"},
				{"etc", "you get the idea"}
                            };

             }
         }

        public static bool IsValidState(string state)
        {
            return Dictionary.Contains(state);
        }
    }