public void Deposit(BankAccount account, decimal amount, string description) { if (!_transactions.ContainsKey(account.AccountNumber)) { _transactions.Add(account.AccountNumber, new List<Transaction>()); } var transaction = new Transaction { AccountNumber = account.AccountNumber, Amount = amount, Description = description }; _transactions[account.AccountNumber].Add(transaction); }
public void Withdraw(BankAccount account, decimal amount, string description) { if (!_transactions.ContainsKey(account.AccountNumber)) { _transactions.Add(account.AccountNumber, new List<Transaction>()); } if (Balance(account) < amount) { throw new InsufficientFundsException(account.AccountNumber, amount); } var transaction = new Transaction { AccountNumber = account.AccountNumber, Amount = -amount, Description = description }; _transactions[account.AccountNumber].Add(transaction); }