如何向WinForm返回异步HttpClient响应？

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

namespace WinFormAsyncHttpClient
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private async void button1_Click(object sender, EventArgs e)
        {
            // 调用异步方法发送HTTP请求并获取响应
            string response = await SendHttpRequestAsync();

            // 将响应内容显示在WinForm上
            textBox1.Text = response;
        }

        private async Task<string> SendHttpRequestAsync()
        {
            // 创建HttpClient实例
            using (HttpClient client = new HttpClient())
            {
                // 发送异步GET请求并等待响应
                HttpResponseMessage response = await client.GetAsync("https://api.example.com");

                // 确保响应成功
                response.EnsureSuccessStatusCode();

                // 读取响应内容并等待内容的读取
                string content = await response.Content.ReadAsStringAsync();

                // 返回响应内容
                return content;
            }
        }
    }
}