Question 1

How to configure NLog with appsettings.json in a .NET Core project?

Accepted Answer

Install NLog.Extensions.Logging, call `AddNLog()` in your service configuration, and add NLog settings to appsettings.json. Use the `${configsetting}` renderer to reference appsettings values in your NLog targets.

Question 2

NLog vs Serilog for .NET Core, which should I choose?

Accepted Answer

NLog excels in flexible configuration and deep Microsoft integration, while Serilog is praised for structured logging and sinks. Both support ILogger; pick based on your team's familiarity and specific logging needs like performance or ecosystem tools.

Question 3

Does NLog.Extensions.Logging work with ASP.NET Core 6 or newer?

Accepted Answer

Yes, but the README recommends using NLog.Web.AspNetCore for ASP.NET Core, as it includes additional features tailored for web environments. NLog.Extensions.Logging is more suited for console apps or general .NET Core hosting.

Question 4

How to capture custom properties in logs using NLog and ILogger?

Accepted Answer

Use ILogger's `BeginScope` to add scope properties, which NLog captures with layout renderers like `${scopeproperty}`. Also, structured logging with message templates automatically logs properties for enhanced traceability.

Question 5

Why isn't NLog writing logs in my ASP.NET Core app?

Accepted Answer

Ensure you have the correct package (NLog.Web.AspNetCore for web apps), check configuration in appsettings.json or NLog.config, set appropriate logging levels, and enable NLog's internal log for debugging errors.

Question 6

What's the performance impact of using NLog with Microsoft logging?

Accepted Answer

NLog is optimized, but the integration layer adds minor overhead. For high-throughput applications, fine-tune NLog targets (e.g., async wrappers) and filters to minimize impact, though it's generally negligible in most scenarios.

NLog.Extensions.Logging

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