What are some 'good use' examples of dynamic casting?

Question

We often hear/read that one should avoid dynamic casting. I was wondering what would be \'good use\' examples of it, according to you?

Edit:

Yes, I\'m aware

Answer 1

It is very useful, however, most of the times it is too useful: if for getting the job done the easiest way is to do a dynamic_cast, it's more often than not a symptom of bad OO design, what in turn might lead to trouble in the future in unforeseen ways.