Log4net doesn't write to file

Question

I want add new log to file.this is my appender:

Answer 1

You need to initialise the logging as the very first step in your app, and from the same assembly that you have the [assembly] tag:

From the docs:

Therefore if you use configuration attributes you must invoke log4net to allow it to read the attributes. A simple call to LogManager.GetLogger will cause the attributes on the calling assembly to be read and processed. Therefore it is imperative to make a logging call as early as possible during the application start-up, and certainly before any external assemblies have been loaded and invoked.

Add something like this in your start up code:

LogManager.GetLogger("Initialises logging from assembly attributes");