C# Discord.net将文件作为图像添加到嵌入

using Discord;
using Discord.WebSocket;
using System;
using System.IO;
using System.Threading.Tasks;

public class Program
{
    private DiscordSocketClient _client;

    public static void Main(string[] args)
        => new Program().RunBotAsync().GetAwaiter().GetResult();

    public async Task RunBotAsync()
    {
        _client = new DiscordSocketClient();

        _client.Log += Log;

        await _client.LoginAsync(TokenType.Bot, "YOUR_BOT_TOKEN");

        await _client.StartAsync();

        _client.MessageReceived += HandleMessageReceived;

        await Task.Delay(-1);
    }

    private async Task HandleMessageReceived(SocketMessage message)
    {
        if (message.Content == "!embed")
        {
            var embed = new EmbedBuilder();

            // 添加文件作为图像到嵌入
            var fileStream = File.OpenRead("path_to_image_file");
            var imageStream = new MemoryStream();
            await fileStream.CopyToAsync(imageStream);
            fileStream.Close();
            imageStream.Position = 0;

            embed.WithImageUrl("attachment://image.png");
            var attachment = new Attachment(imageStream, "image.png");

            await message.Channel.SendFileAsync(attachment, embed: embed.Build());
        }
    }

    private Task Log(LogMessage arg)
    {
        Console.WriteLine(arg);
        return Task.CompletedTask;
    }
}