Przechowywanie datasource pomiędzy PostBack

        private string _countriesList = "countries";

        private List<CountryInfo> _countries;

        private List<CountryInfo> Countries

        {

            get

            {

                if (ViewState[_countriesList] == null)

                    return new List<CountryInfo>();

                return (List<CountryInfo>)ViewState[_countriesList];

            }

            set

            {

                ViewState[_countriesList] = value;

                _countries = value;

            }

        }