使用PostAsync将内容主体中的JSON传递到端点

using System;
using System.Net.Http;
using System.Threading.Tasks;

public class Program
{
    public static async Task Main()
    {
        // 创建HttpClient实例
        using (HttpClient client = new HttpClient())
        {
            // 构造要发送的JSON数据
            string json = "{\"name\":\"John\", \"age\":30}";

            // 创建HttpContent对象，将JSON数据作为内容
            HttpContent content = new StringContent(json);

            // 设置内容类型为application/json
            content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/json");

            // 发送POST请求并获取响应
            HttpResponseMessage response = await client.PostAsync("https://example.com/api/endpoint", content);

            // 检查响应是否成功
            if (response.IsSuccessStatusCode)
            {
                // 处理成功响应
                string result = await response.Content.ReadAsStringAsync();
                Console.WriteLine("请求成功：" + result);
            }
            else
            {
                // 处理错误响应
                Console.WriteLine("请求失败：" + response.StatusCode);
            }
        }
    }
}