Error Logging using Log4Net for azure and normal applications

Following are good links for error logging using Log4Net

For Normal Applications:
http://geekswithblogs.net/MarkPearl/archive/2012/01/30/log4net-basics-with-a-console-application-c.aspx

For Azure Applications:
http://www.kongsli.net/nblog/2011/08/15/log4net-writing-log-entries-to-azure-table-storage/