问题
M question is related to this one as I have the same problem. How can I make the RollingFileAppender of log4net preserve the file extension without having to actually "patch" (i.e. create an interim build of the current trunk) log4net? How could I achieve the same thing by overriding the RollingFileAppender or creating any other extension with the least effort?
回答1:
As mentioned in my comment, you're not required to "patch" or change anything in log4net. You cannot use the 1.2.10 release, though. It is a rather old build, but the PreserveLogFileNameExtension is in the current source. You only have to bring down the source and compile the dll yourself and you're good to go.
Update: I see your concern. IMO, the only way is to make a build and test it. To further your confidence you could review the current list of resolved (and unresolved) issues for 1.2.11. I would think that seeing they are not doing a major revision, changes are mainly bug fixes and additional features.
来源：https://stackoverflow.com/questions/6643759/rollingfileappender-preserve-the-file-extension-without-log4net-patch