To process a payment, you must initialize an Options object with your credentials and a CreatePaymentRequest object containing the transaction details (price, currency, buyer info, card info, and basket items). Finally, call Payment.Create(request, options).
Options options = new Options();
options.ApiKey = "your api key";
options.SecretKey = "your secret key";
options.BaseUrl = "https://sandbox-api.iyzipay.com";
CreatePaymentRequest request = new CreatePaymentRequest();
request.Locale = Locale.TR.ToString();
request.ConversationId = "123456789";
request.Price = "1";
request.PaidPrice = "1.2";
request.Currency = Currency.TRY.ToString();
request.Installment = 1;
request.BasketId = "B67832";
request.PaymentChannel = PaymentChannel.WEB.ToString();
request.PaymentGroup = PaymentGroup.PRODUCT.ToString();
PaymentCard paymentCard = new PaymentCard();
paymentCard.CardHolderName = "John Doe";
paymentCard.CardNumber = "5528790000000008";
paymentCard.ExpireMonth = "12";
paymentCard.ExpireYear = "2030";
paymentCard.Cvc = "123";
paymentCard.RegisterCard = 0;
request.PaymentCard = paymentCard;
Buyer buyer = new Buyer();
buyer.Id = "BY789";
buyer.Name = "John";
buyer.Surname = "Doe";
buyer.GsmNumber = "+905350000000";
buyer.Email = "email@email.com";
buyer.IdentityNumber = "74300864791";
buyer.LastLoginDate = "2015-10-05 12:43:35";
buyer.RegistrationDate = "2013-04-21 15:12:09";
buyer.RegistrationAddress = "Nidakule Göztepe, Merdivenköy Mah. Bora Sok. No:1";
buyer.Ip = "85.34.78.112";
buyer.City = "Istanbul";
buyer.Country = "Turkey";
buyer.ZipCode = "34732";
request.Buyer = buyer;
Address shippingAddress = new Address();
shippingAddress.ContactName = "Jane Doe";
shippingAddress.City = "Istanbul";
shippingAddress.Country = "Turkey";
shippingAddress.Description = "Nidakule Göztepe, Merdivenköy Mah. Bora Sok. No:1";
shippingAddress.ZipCode = "34742";
request.ShippingAddress = shippingAddress;
Address billingAddress = new Address();
billingAddress.ContactName = "Jane Doe";
billingAddress.City = "Istanbul";
billingAddress.Country = "Turkey";
billingAddress.Description = "Nidakule Göztepe, Merdivenköy Mah. Bora Sok. No:1";
billingAddress.ZipCode = "34742";
request.BillingAddress = billingAddress;
List<BasketItem> basketItems = new List<BasketItem>();
BasketItem firstBasketItem = new BasketItem();
firstBasketItem.Id = "BI101";
firstBasketItem.Name = "Binocular";
firstBasketItem.Category1 = "Collectibles";
firstBasketItem.Category2 = "Accessories";
firstBasketItem.ItemType = BasketItemType.PHYSICAL.ToString();
firstBasketItem.Price = "0.3";
basketItems.Add(firstBasketItem);
// ... add other items ...
request.BasketItems = basketItems;
Payment payment = Payment.Create(request, options);
