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Using sample Autorize.net c# simple example

Ron Renninger
Last Modified: 2017-04-26
I am trying a very simple sample of authorize.net in c#. I pasted what i am trying to do below. Just wondering how to get this to work.

Step 1

Get the Authorize.Net C# Sample Code

Our C# sample code project provides samples of all our API features & functions. Get the sample code project from GitHub.  If you are adding the SDK to an existing project simply install with the nuget package manager.  For example:


PM> Install-Package AuthorizeNet


Step 2

Charge a Credit Card

The Hello World program for payments is charging a credit card.  The code below (source code) will charge a test card and print the auth code & transaction ID to the console.  For a full list of C# samples see our sample code repository on GitHub. You can also try all of our API requests in the API Reference.

using System;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Collections.Generic;
using AuthorizeNet.Api.Controllers;
using AuthorizeNet.Api.Contracts.V1;
using AuthorizeNet.Api.Controllers.Bases;

namespace net.authorize.sample
	public class ChargeCreditCard
		public static void Run(String ApiLoginID, String ApiTransactionKey)
			Console.WriteLine("Charge Credit Card Sample");

			ApiOperationBase.RunEnvironment = AuthorizeNet.Environment.SANDBOX;

			// define the merchant information (authentication / transaction id)
			ApiOperationBase.MerchantAuthentication = new merchantAuthenticationType()
				name = ApiLoginID,
				ItemElementName = ItemChoiceType.transactionKey,
				Item = ApiTransactionKey,

			var creditCard = new creditCardType
				cardNumber = "4111111111111111",
				expirationDate = "0718"

			//standard api call to retrieve response
			var paymentType = new paymentType { Item = creditCard };

			var transactionRequest = new transactionRequestType
				transactionType = transactionTypeEnum.authCaptureTransaction.ToString(),   // charge the card
				amount = 133.45m,
				payment = paymentType
			var request = new createTransactionRequest { transactionRequest = transactionRequest };
			// instantiate the contoller that will call the service
			var controller = new createTransactionController(request);
			// get the response from the service (errors contained if any)
			var response = controller.GetApiResponse();

			if (response.messages.resultCode == messageTypeEnum.Ok)
				if (response.transactionResponse != null)
					Console.WriteLine("Success, Auth Code : " + response.transactionResponse.authCode);
				Console.WriteLine("Error: " + response.messages.message[0].code + "  " + response.messages.message[0].text);
				if (response.transactionResponse != null)
					Console.WriteLine("Transaction Error : " + response.transactionResponse.errors[0].errorCode + " " + response.transactionResponse.errors[0].errorText);

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Step 3

Run It

Build the project to create the SampleCode exe.  Then run it:

 SampleCode ChargeCreditCard
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