Exists to check if a configuration section exists

HomeController.cs

public class HomeController : Controller
{
    private readonly ILogger<HomeController> _logger;
    private readonly IConfiguration configuration;

    public HomeController(ILogger<HomeController> logger, IConfiguration configuration)
    {
        _logger = logger;
        this.configuration = configuration;
    }

    public IActionResult Index()
    {
        var loggingSection = configuration.GetSection("Logging");

        // To check if the section has a value or has children.
        if (!loggingSection.Exists())
        {
            throw new System.Exception("logging section does not exist.");
        }

        return View();
    }
}