What is Logging in ASP.NET Core? See Example

Logging in ASP.NET Core allows developers to track application behavior, errors, and diagnostics. It is essential for debugging, monitoring, and maintaining web applications. ASP.NET Core provides built-in logging providers like Console, Debug, EventSource, and third-party providers like Serilog and NLog.

Key Features:

• Supports multiple logging providers
• Structured logging for better analysis
• Configurable logging levels (Information, Warning, Error, Critical)
• Integrated with dependency injection
• Useful for debugging and monitoring production apps

Example:
Using the built-in logger in a controller:

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

    public HomeController(ILogger<HomeController> logger)
    {
        _logger = logger;
    }

    public IActionResult Index()
    {
        _logger.LogInformation("Index page visited.");
        return View();
    }
}

Logging in ASP.NET Core helps monitor application performance, identify issues quickly, and improve overall application reliability.

Citations:

• Learn more on Savanka
• Official ASP.NET Core Documentation