public OwnedStockDetailsPage(OwnedStock ownedStock)
        {
            OwnedStock = ownedStock;
            OwnedStock.UpdateOwnedAsset();
            BindingContext = this;
            InitializeComponent();

            editNumOfShares = new SfNumericTextBox {
                Value = 0
            };
            editNumOfShares.ValueChanged += Handle_NumSharesChanged;

            editPurchasePrice = new SfNumericTextBox {
                Value = 0
            };
            editPurchasePrice.ValueChanged += Handle_PriceChanged;

            editReturnGoal = new SfNumericTextBox {
                Value = 0
            };
            editReturnGoal.ValueChanged += Handle_ReturnGoalChanged;
        }