public void UpdateStockHistoryDataFromAPI() { IList <StockHistoryModel> newStockHistoryInfo = stockHistoryAPIDao.GetLastCloseStockHistory(); foreach (StockHistoryModel stockHistory in newStockHistoryInfo) { bool isDuplicate = stockDao.CheckForDuplicateHistoryEntry(stockHistory.TradingDay, stockHistory.StockSymbol); if (!isDuplicate) { stockDao.AddHistoryEntry(stockHistory); } } }