Ошибка CS7036 помогите пофиксить [закрыт]

Ошибка:

CS7036 Отсутствует аргумент, соответствующий требуемому формальному параметру "services" из "CommandService.AddModulesAsync(Assembly, IServiceProvider)".

public class CommandHeadler {
    private DiscordSocketClient _client;
    private CommandService _service;
    public CommandHeadler(DiscordSocketClient client) {
        _client = client;
        _service = new CommandService();
        _service.AddModulesAsync(Assembly.GetEntryAssembly());
        _client.MessageReceived += HandleCommandAsync;
    }
    private async Task HandleCommandAsync(SocketMessage s) {
        var msg = s as SocketUserMessage;
        if (msg == null) return;
        var context = new SocketCommandContext(_client, msg);
        int argPos = 0;
        if (msg.HasCharPrefix('!', ref argPos)) {
            var result = await _service.ExecuteAsync(context, argPos);
            if (!result.IsSuccess && result.Error != CommandError.UnknownCommand) {
                await context.Channel.SendMessageAsync(result.ErrorReason);
            }
        }
    }
}