private void GetItineraryLandmarks(Itinerary itinerary, SqlConnection conn)
{
const string procedureName = "GetItinerary";
SqlCommand cmd = new SqlCommand(procedureName, conn);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("@itinerary_id", itinerary.ItineraryID);
IDataReader dataReader = cmd.ExecuteReader();
itinerary.AddLandmarks(dataReader);
}