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 important thing is to understand the path of exceptions through your application, and not just throw or catch them arbitrarily. For example, what if the exception you catch is Out-Of-Memory? Are you sure that your dialog box is going to display in that case? But it is certainly fine to define a last-ditch exception point and say that you never want errors to propagate past that point.