C# (CSharp) DBCollection.Contains примеры использования

Пример #1

        private DBDocument GetExpenseType(string id)
        {
            DBCollection expenseTypes = GetExpenseTypes();

            return((expenseTypes.Contains(id)) ? expenseTypes[id] : null);
        }

Пример #2

        private DBDocument GetPayType(string id)
        {
            DBCollection payTypes = GetPayTypes();

            return((payTypes.Contains(id)) ? payTypes[id] : null);
        }