How to use NLog LogMessageGenerator delegate?

Question

If I want to achieve the best performance with NLog , what should I do in my code for this?

(Of course, I have async enabled in NLog.config.)

How to use a delegate to write log messages?

_logger.Info(() => { return "test" });

Unfortunately, I could not figure out how to use this “correctly”. Is it even documented?

_logger.Info(() => { return string.Format("msg", myParams); }); // Is that the way to go?

Answer 1

The recommendations are as follows:

• For a simple string, just pass it _logger.Info("test");
• Use overloads for parameter string _logger.Info("test with {0}", "value");
• For expensive operation, use _logger.Info(() => expensiveOperation);or_logger.Info(() => {expensiveOperation()});
• / .. _logger.IsInfoEnabled ..

Answer 2

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_logger.Info(() => { return "test" });

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_logger.Info("test");

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_logger.Info(() => "test");
_logger.Info(() => string.Format("msg", myParams));

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