gistfile1.cs

        public static List<T> LoadLookup<T, U>(IDataReader reader) where T : ILookup<U>, new()
        {
            List<T> list = new List<T>();
            try
            {
                while (reader.Read())
                {
                    T lookup = new T();
                    lookup.ID = (U)reader["ID"];
                    lookup.Name = (string)reader["Name"];
                    list.Add(lookup);
                }
                return list;
            }
            finally
            {
                reader.Close();
            }
        }

// to call
            IDataReader reader = SqlProvider.Instance().GetAlliances();
            return DataHelper.LoadLookup<Alliance, byte>(reader);