public void DeleteSymbol(PositionEntry positionEntry)
        {
            TransactionFeed transactionFeed = FinanceService.Query(new TransactionQuery(positionEntry.TransactionHerf + Details())); //+ FinanceNamespace.TRANSACTIONSAPPENDQUERY));

            foreach (TransactionEntry transactionEntry in transactionFeed.Entries)
            {
                FinanceService.Delete(new Uri(transactionEntry.EditUri.Content));
            }
        }
        public TransactionEntry AddSymbol(string exchange, string symbol, TransactionDataArgs args, PortfolioEntry entry)
        {
            PositionFeed positionFeed = FinanceService.Query(new PositionQuery(entry.EditUri.Content + FinanceNamespace.POSITIONAPPENDQUERY + Details()));

            TransactionEntry transactionEntry = new TransactionEntry()
            {
                TransactionData = new TransactionData()
                {
                    Type = args.TransactionType,
                    Date = args.Date.ToString(),
                    Shares = args.Shares,
                    Notes = args.Notes,
                    Commission = new Commission(),
                    Price = new Price()
                }
            };

            PositionEntry positionEntry = new PositionEntry()
            {
                Symbol = new Symbol()
                {
                    StockSymbol = symbol,
                    Exchange = exchange
                }
            };

            transactionEntry.TransactionData.Commission.Money.Add(new Money() { Amount = args.Commission, CurrencyCode= args.CurrencyCode });
            transactionEntry.TransactionData.Price.Money.Add(new Money() { Amount = args.Price, CurrencyCode= args.CurrencyCode });

            Uri uri = new Uri(positionFeed.Feed + "/" + positionEntry.Symbol.Exchange + ":" + positionEntry.Symbol.StockSymbol + "/" + FinanceNamespace.TRANSACTIONS);

            try
            {
                return FinanceService.Insert(uri, transactionEntry);
            }
            catch (Exception ex)
            {
                Console.WriteLine("Exception while trying to add symbol={0} to portfolio={1} and transaction: ", positionEntry.Symbol.Exchange + ":" + positionEntry.Symbol.StockSymbol, entry.Title.Text);
                Console.WriteLine("Type={0}, Date={1}, Shares={2}, Notes={3}, Commission={4}, Price={5}", 
                    transactionEntry.TransactionData.Type,
                    transactionEntry.TransactionData.Date,
                    transactionEntry.TransactionData.Shares,
                    transactionEntry.TransactionData.Notes,
                    transactionEntry.TransactionData.Commission,
                    transactionEntry.TransactionData.Price);
                Console.WriteLine("Exception: {0}", ex.Message);
                return null;
            }
        }
        public List<TransactionEntry> RetrieveSymbolTransaction(PositionEntry entry)
        {
            TransactionFeed transactionFeed = FinanceService.Query(new TransactionQuery(entry.TransactionHerf + Details()));

            List<TransactionEntry> transactionEntries = new List<TransactionEntry>();

            //transactionFeed.Entries.ToList<AtomEntryCollection>().ForEach(t => transactionEntries.Add(t));
            foreach (TransactionEntry te in transactionFeed.Entries)
            {
                transactionEntries.Add(te);
            }
            return transactionEntries;
        }
        public TransactionEntry AddSymbol(string exchange, string symbol, PortfolioEntry entry)
        {
            PositionFeed positionFeed = FinanceService.Query(new PositionQuery(entry.EditUri.Content + FinanceNamespace.POSITIONAPPENDQUERY + Details()));

            TransactionEntry transactionEntry = new TransactionEntry()
            {
                TransactionData = new TransactionData()
                {
                    Type = TransactionTypes.BUY
                }
            };

            PositionEntry positionEntry = new PositionEntry()
            {
                Symbol = new Symbol()
                {
                    StockSymbol = symbol,
                    Exchange = exchange
                }
            };

            Uri uri = new Uri(positionFeed.Feed + "/" + positionEntry.Symbol.Exchange + ":" + positionEntry.Symbol.StockSymbol + "/" + FinanceNamespace.TRANSACTIONS);
            try
            {
                return FinanceService.Insert(uri, transactionEntry);
            }
            catch (Exception ex)
            {
                Console.WriteLine("Exception while trying to add symbol={0} to portfolio={1}", symbol + ":" + exchange, entry.Title.Text);
                Console.WriteLine("Exception: {0}", ex.Message);
                return null;
            }
        }