log4net - Appenders not working in IIS7.5

Question

I am able to write to a log file using log4net and Cassini/IIS dev server, but when I use IIS7.5, I can\'t write out to a file.

Initially, I got a security exception

Answer 1

You can enable log4net internal debugging by adding the key log4net.Internal.Debug to your application configuration file.

This will write debug messages to the console and the System.Diagnostics.Trace system. You can then log these messages to a text file by adding a trace listener to you configuration file. Make sure the application has permission to write to the file.

Alternatively, trace messages are also written to the system debugger, so you can use a utility like DebugView to capture the messages. See the log4Net FAQ for more details.