[Wish] New Exception

[Wish] New Exception


I'd like to suggest the creation of a new "System" Exception simillar to the Security Exception (perhaps under the Security Exception, even).
The "Session Exception".

It happens frequently when a user clicks on a save button, that he waited to long on that screen and the session is lost. This results on some session information (like the UserId) becoming NULL. And then a NULL value will be recorded on the Database on the UserId field.

Could you implement somekind of Exception, where we could trap this "session timeout" and return an appropriate error?