Structured logging (ARCH1002)

Key dotnet.logging.structured-logging · Severity warning · Category logging

Logs built with string interpolation or concatenation do not produce searchable fields. Use structured logging with named placeholders.

Incorrect

_logger.LogInformation("Order " + orderId + " processed, amount: " + amount);

Correct

_logger.LogInformation("Order {OrderId} processed, amount: {Amount}", orderId, amount);

Fix

Move variables into named {Placeholder} tokens in the message template and pass them as arguments.