I have been looking for a logging framework for .net (c#) and decided to give log4net a go after reading up on a few question/answer threads here on stackoverflow. I see people mentioning over and over that they use a wrapper class for log4net and I am wonder what that would look like.

I have my code split up into different projects (data access/business/webservice/..).
How would a log4net wrapper class look like? Would the wrapper class need to be included in all of the projects? Should I build it as a separate project all together? 

Should the wrapper be a singleton class?