Exceptions in c#

Question

In c# if I define an exception then will it be derived directly or indirectly from System.Exception class? Does finally block always executes regardless of whether or not an exception occurs in the associated try block?

Vulpes · Answer

Yes if you define your own exception class then you should inherit from System.Exception or from a class which derives (ultimately) from System.Exception. The finally block always executes regardless of whether there's an exception or not except in the case of certain 'fatal' exceptions. Check my post to this recent thread for an example of the latter: http://www.c-sharpcorner.com/Forums/Thread/181054/try-catch-finally.aspx