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Asked: 2026-05-11T03:19:52+00:00

I want log4net to write log files (using RollingFileAppender) to a subfolder of the

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I want log4net to write log files (using RollingFileAppender) to a subfolder of the common application data folder (e.g. C:\Documents and Settings\All Users\Application Data\Company\Product\Logs).
However, on Win XP, there is no environment variable that specifies this folder. We have %ALLUSERSPROFILE%, we have %APPDATA%, but there is nothing like %ALLUSERSAPPDATA%.
Programatically, I could use Environment.SpecialFolder.CommonApplicationData, but I need to put it in the log4net config, something like this: 

<appender name='RollingFileAppender' type='log4net.Appender.RollingFileAppender'>    <file value='%ALLUSERSAPPDATA%\Company\Product\Logs\error.log' /> </appender>

OK, we could define this in our setup, but maybe someone comes up with a better idea?

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1 Answer

  1. This posting on the log4net mailinglist explains how you can define your own path replacement variables.

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