Discord.net 语音通道 ConnectAsync() 错误：SlashCommandExecuted 处理程序正在阻止网关任务

Question

我想做音乐机器人

所以，我做了

public async Task SlashCommandHandler(SocketSlashCommand command)
        {
            if (command.User.IsBot) return;

            if (command.Data.Name.Equals("music"))
            {
                SocketGuildUser guildUser = command.User as SocketGuildUser;
                IVoiceChannel voiceChannel = guildUser.VoiceChannel;

                if (voiceChannel == null)
                {
                    await command.Channel.SendMessageAsync("X");
                    // TODO: Send error embed
                    return;
                }

                string? url = null;

                foreach (SocketSlashCommandDataOption option in command.Data.Options)
                {
                    if (option.Name.Equals("url"))
                    {
                        url = (string)option.Value;
                    }
                }

                Console.WriteLine(url);

                await voiceChannel.ConnectAsync();
                //handler is blocking the gateway task

                await SendAsync((IAudioClient)voiceChannel, url);
            }
        }

        private Process? CreateStream(string path)
        {
            return Process.Start(new ProcessStartInfo
            {
                FileName = "ffmpeg",
                Arguments = $"-hide_banner -loglevel panic -i \"{path}\" -ac 2 -vol 512 -f s16le - ar 48000 pipe:1",
                UseShellExecute = false,
                RedirectStandardOutput = true,
            });
        }

        private async Task SendAsync(IAudioClient client, string path)
        {
            // Create FFmpeg using the previous example
            using (var ffmpeg = CreateStream(path))
            using (var output = ffmpeg.StandardOutput.BaseStream)
            using (var discord = client.CreatePCMStream(AudioApplication.Mixed))
            {
                try { await output.CopyToAsync(discord); }
                finally { await discord.FlushAsync(); }
            }
        }
    }

这个

并调试这个，我得到

00:35:48 Gateway     A SlashCommandExecuted handler is blocking the gateway task.
00:36:00 Gateway     A SlashCommandExecuted handler has thrown an unhandled exception.:
System.TimeoutException: The operation has timed out.
   at Discord.WebSocket.SocketGuild.ConnectAudioAsync(UInt64 channelId, Boolean selfDeaf, Boolean selfMute, Boolean external)
   at Discord.WebSocket.SocketGuild.ConnectAudioAsync(UInt64 channelId, Boolean selfDeaf, Boolean selfMute, Boolean external)
   at Discord.WebSocket.SocketVoiceChannel.ConnectAsync(Boolean selfDeaf, Boolean selfMute, Boolean external)
   at {Bot name}.EventListener.SlashCommandListener.SlashCommandHandler(SocketSlashCommand command) in {Project Path}\SlashCommandListener.cs:line 50
   at Discord.EventExtensions.InvokeAsync[T](AsyncEvent`1 eventHandler, T arg)
   at Discord.WebSocket.DiscordSocketClient.TimeoutWrap(String name, Func`1 action)

控制台出现此错误

第 50 行的代码是

await voiceChannel.ConnectAsync();

这个

我想要

1. 获取命令作者
2. 获取命令的选项（名称为 'url'）
3. 获取作者的语音频道并加入频道
4. 发送语音

让我知道如何解决这个错误，如果你教我如何简单整洁地编写代码，我将非常感谢你