Log4Net (I assume that's what you mean by LogForNet) provides much more
fine-grained control over logging. It is very much easier to turn logging
for individual components on and off with Log4Net. Log4Net also ships with
a wide range of log output handlers - you can have it write to text files on
a rotating basis, or a new text file for each day, or you can send output to
the system event log... Or you can plug in your own 'appender' to write the
output somewhere else entirely.
You can do a fair amount of this with System.Diagnostic.Trace too, it just
takes about 100 times as much effort. And you usually end up writing a
wrapper for it to get the flexibility you require. And at that point, it
doesn't seem to offer a lot.
On the projects where I've used log4net, it has made it very easy to do
logging configurations that would have taken ages to get working with the
basic Trace class.
