I am doing some error logging and I want to make sure I extract as much useful information as possible from the exceptions. I don't think, however, that I fully understand exception structure.
For example, why do some exceptions have 'inner exceptions' and others don't. I presume the inner most exception is the most useful one as that is the root cause. How do i get the inner exception? What other information do I need to extract from my exception? Also how do I get the stack trace for an exception?