1. 首先，在Startup.cs中注册ILogger和IEmailProvider服务：

public void ConfigureServices(IServiceCollection services)
{
    services.AddLogging();
    services.AddScoped();
}

2. 创建自定义电子邮件提供程序IEmailProvider：

public interface IEmailProvider
{
    void SendEmail(string recipient, string subject, string message);
}

public class EmailProvider : IEmailProvider
{
    public void SendEmail(string recipient, string subject, string message)
    {
        // Implementation details
    }
}

3. 注入ILogger和IEmailProvider服务到类中：

public class MyController : ControllerBase
{
    private readonly ILogger _logger;
    private readonly IEmailProvider _emailProvider;

    public MyController(ILogger logger, IEmailProvider emailProvider)
    {
        _logger = logger;
        _emailProvider = emailProvider;
    }

    // Use ILogger and IEmailProvider in a method
    public IActionResult Index()
    {
        _logger.LogInformation("Email sent");
        _emailProvider.SendEmail("recipient@domain.com", "Subject", "Message");
        return View();
    }
}

这样，将DI添加到日志记录器和电子邮件提供程序中，就可以在控制器中使用它们。