示例代码，“csharp，// 引入相关命名空间，using System;，using System.Web.Script.Serialization;，using System.IO;，using System.Net;，，public class ThirdPartyPayment，{， private string apiUrl = “https://api.example.com/pay”;， private string apiKey = “your_api_key”;， private JavaScriptSerializer jsonSerializer = new JavaScriptSerializer();，， public string InitiatePayment(double amount, string currency, string description)， {， var paymentData = new， {， amount = amount,， currency = currency,， description = description,， api_key = apiKey， };，， string jsonData = jsonSerializer.Serialize(paymentData);， HttpWebRequest request = (HttpWebRequest)WebRequest.Create(apiUrl);， request.Method = “POST”;， request.ContentType = “application/json”;， request.Accept = “application/json”;，， using (StreamWriter streamWriter = new StreamWriter(request.GetRequestStream()))， {， streamWriter.Write(jsonData);， streamWriter.Flush();， streamWriter.Close();， }，， HttpWebResponse response = (HttpWebResponse)request.GetResponse();， using (StreamReader streamReader = new StreamReader(response.GetResponseStream()))， {， return streamReader.ReadToEnd();， }， }，}，“，，上述代码展示了一个简单的使用Asp.Net语言编写的第三方支付平台API调用示例，通过构建支付数据并发起POST请求来初始化支付。
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