Discord.net获取用户的角色列表

using Discord;
using Discord.WebSocket;
using System;
using System.Linq;
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.Ready += () =>
        {
            var guild = _client.GetGuild(GUILD_ID);
            var user = guild.GetUser(USER_ID);

            var roles = user.Roles.Select(r => r.Name);

            Console.WriteLine("User's Roles:");
            foreach (var role in roles)
            {
                Console.WriteLine(role);
            }

            return Task.CompletedTask;
        };

        await Task.Delay(-1);
    }

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