private IEnumerable <AccountTransactionService.RolledTransaction> GetRolledTransactions(int customerId) { var rolledTrans = new List <AccountTransactionService.RolledTransaction>(); foreach (CustomerAccount account in GetCustomerAccounts(customerId)) { rolledTrans.AddRange( _accountTransactionService.GetOutstandingTransactionsForAccount(account.CustomerAccountId).ToList()); } return(rolledTrans); }