public List <LastTransactionDTO> UpdateLastWeekTransactionList(List <LastTransactionDTO> currentList, DateTime date, decimal amount) { List <LastTransactionDTO> list = currentList; for (int i = 0; i < 7; i++) { DateTime currentDate = DateConverter.DoubleToDateTime(list.ElementAt(i).Date); if (currentDate.CompareTo(date) == 0) { list.ElementAt(i).Amount = amount; break; } } return(list); }