Braintree.TestUtil.TestHelper.GetNonceForPayPalAccount C# (CSharp) Method

        public static string GetNonceForPayPalAccount(BraintreeGateway gateway, Params paypalAccountDetails)
        {
            var clientToken = GenerateDecodedClientToken(gateway);
            var authorizationFingerprint = extractParamFromJson("authorizationFingerprint", clientToken);
            var builder = new RequestBuilder();
            builder.AddTopLevelElement("authorization_fingerprint", authorizationFingerprint);
            foreach (var param in paypalAccountDetails)
                builder.AddTopLevelElement(string.Format("paypal_account[{0}]", param.Key), param.Value.ToString());

            var response = new BraintreeTestHttpService().Post(gateway.MerchantId, "v1/payment_methods/paypal_accounts", builder.ToQueryString());

#if netcore
            StreamReader reader = new StreamReader(response.Content.ReadAsStreamAsync().Result, Encoding.UTF8);
            string responseBody = reader.ReadToEnd();
            return extractParamFromJson("nonce", responseBody);
#else
            return extractParamFromJson("nonce", response);
#endif
        }