Comments by Rolf Kristensen (Top 3 by date)

The question was why no output from NLog. The answer is usually to ensure NLog.config is loaded (hence my advice about using assembly resource). And secondly to fix target issues like file-permissions (hence my advice about checking NLog InternalLogger for errors). If you now have a different errors, then you should update your question.

The NLog archive-logic includes cleanup of old files, and it uses file-wildcard to recognize what files to remove. If using "random" filenames (ex. longdate), then the file-wildcard will fail.