Log4net 日志使用介绍
http://www.cnblogs.com/jys509/p/4699813.html
log4net Tutorial
http://www.codeproject.com/Articles/140911/log4net-Tutorial
Log4Net Troubleshooting
http://haacked.com/archive/2006/09/27/Log4Net_Troubleshooting.aspx/
原文：http://www.cnblogs.com/heuyang/p/4955138.html