public void BuyStock(Stock s)
{
decimal? amount = s.DayValue * s.Quantity;
if (amount == null)
throw new ArgumentException("Stock must have a valid quantity and value : " + s, "s");
if (amount > mRemain)
throw new ArgumentException("Balance Remaining must be greater than the cost of the Stock " + s.Name, "s");
Remaining -= amount.Value;
mStocks.Add(s);
Worth += amount.Value;
}
public void SellStock(Stock s, decimal qty)
{
var walletStock = mStocks.FirstOrDefault(stock => stock.ID == s.ID);
if (walletStock == null)
throw new ArgumentException("Cannot sell Stock " + s.Name + ": It is not in the wallet!", "s");
if (qty > walletStock.Quantity)
throw new ArgumentException("Cannot sell " + qty + " of Stock " + s.Name + " as there is only " + walletStock.Quantity + " in the wallet.", "qty");
var amount = qty * s.DayValue;
walletStock.Quantity -= qty;
Worth -= amount;
Remaining += amount;
if (walletStock.Quantity == 0)
mStocks.Remove(s);
}
