[Wish] New Exception

[Wish] New Exception

  
Hi,

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?

regards