AdventureWorks.WebServices.Repositories.PaymentMethodRepository.SetDefault C# (CSharp) Метод

        public void SetDefault(string userName, string defaultPaymentMethodId)
        {
            var paymentMethods = _paymentMethodsDictionary[userName];
            
            //Clear old default payment methods
            var oldDefaults = paymentMethods.Where(a => a.IsDefault);
            foreach (var oldDefault in oldDefaults)
            {
                oldDefault.IsDefault = false;
            }

            var defaultPaymentMethod = paymentMethods.Find(a => a.Id == defaultPaymentMethodId);
            if (defaultPaymentMethod != null)
            {
                defaultPaymentMethod.IsDefault = true;
            }
        }