CapturesRefundSample.cs

using PayPal.Sdk.Checkout.Authentication;
using PayPal.Sdk.Checkout.ContractEnums;
using PayPal.Sdk.Checkout.Core.Interfaces;
using PayPal.Sdk.Checkout.Extensions;
using PayPal.Sdk.Checkout.Payments;
using System;
using System.Threading.Tasks;

namespace PayPal.Sdk.Checkout.Samples;

public static class CapturesRefundSample
{
    /// <summary>
    /// Method for refund the capture. Valid capture Id should be passed an argument to this method.
    /// </summary>
    public static async Task<PaymentRefund?> CapturesRefund(
        this IPayPalHttpClient httpClient, AccessToken accessToken,
        string captureId, bool debug = false
    )
    {
        var response = await httpClient.CapturesRefundAsync(
            accessToken,
            captureId,
            request =>
            {
                request.SetPreferReturn(EPreferReturn.Representation);
                request.SetRequestBody(new RefundRequest
                {
                    Amount = new PaymentMoney
                    {
                        Value = "20.00",
                        CurrencyCode = "USD",
                    },
                });
            }
        ).ConfigureAwait(false);

        if (debug && response != null)
        {
            Console.WriteLine("Status: {0}", response.Status);
            Console.WriteLine("Refund Id: {0}", response.Id);
            Console.WriteLine("Links:");
            foreach (var link in response.Links)
            {
                Console.WriteLine("\t{0}: {1}\tCall Type: {2}", link.Rel, link.Href, link.Method);
            }

            Console.WriteLine("Response JSON: \n {0}", response.AsJson());
        }

        return response;
    }

    /*
        Driver Function to perform refund on capture.
        Capture Id should be replaced with the valid capture id.
    */
    // static void Main(string[] args)
    // {
    //     string CaptureId = "<<REPLACE-WITH-VALID-CAPTURE-ID>>";
    //     CapturesRefund(CaptureId, true).Wait();
    // }
}