Catching base Exception class in .NET

Question

I keep hearing that

catch (Exception ex)

Is bad practise, however, I often use it in event handlers where an operation may for example go

Answer 1

The bad practice is

catch (Exception ex){}

and variants:

catch (Exception ex){ return false; }

etc.

Catching all exceptions on the top-level and passing them on to the user (by either logging them or displaying them in a message-box, depending on whether you are writing a server- or a client-application), is exactly the right thing to do.