图像URI不在C#中显示图像

using System;
using System.Drawing;
using System.Net.Http;
using System.Windows.Forms;

public class ImageDisplayForm : Form
{
    private PictureBox pictureBox;

    public ImageDisplayForm()
    {
        // 创建PictureBox控件
        pictureBox = new PictureBox();
        pictureBox.Dock = DockStyle.Fill;
        pictureBox.SizeMode = PictureBoxSizeMode.StretchImage;

        // 添加PictureBox控件到窗体
        Controls.Add(pictureBox);
    }

    public async void DisplayImageFromUri(string uri)
    {
        try
        {
            // 创建HttpClient实例
            using (HttpClient client = new HttpClient())
            {
                // 发送GET请求获取图像数据
                byte[] imageData = await client.GetByteArrayAsync(uri);

                // 将图像数据转换为图像对象
                using (var stream = new System.IO.MemoryStream(imageData))
                {
                    Image image = Image.FromStream(stream);

                    // 显示图像
                    pictureBox.Image = image;
                }
            }
        }
        catch (Exception ex)
        {
            MessageBox.Show("无法显示图像：" + ex.Message);
        }
    }
}

// 使用示例
public class Program
{
    public static void Main()
    {
        // 创建窗体实例
        ImageDisplayForm form = new ImageDisplayForm();

        // 显示图像
        form.DisplayImageFromUri("https://example.com/image.jpg");

        // 运行窗体应用程序
        Application.Run(form);
    }
}