Handling Error in Orchestration

The most fascinating part of Biztalk 2004 Orchestration compared to Biztalk 2000/2002 Xlang to me is Error Handling in Orchestration. In the recent implementation I was able to come up with a central Error handling mechanism.

All the actions in my orchestrations are wrapped under a common Scope with two Exceptional handlers

Orchestration

Scope
{
Step1
Step2
. . . }

Catch1 (System.Exception)
{
build Error message
Call Orchestration ErrorHandler
}
Catch2 (General Exception)
{ build Error message
Call Orchestration ErrorHandler
}

The important thing to note above is you should use System.Exception and not System.SystemException as the Catch Error object (Which is a common mistake)