Domain Specific Language (DSL) with Workflow

Workflow provides two basic activities for interaction with outer world: CallExternalMethodActivity and HandleExternalEventActivity. But sometimes we want to limit our workflow to not use those, since they are too "generic". Instead, we want to provide our set of Domain Specific activities.

The simplest way to achieve this goal is by derivation, providing the required specialization.

Here is a link to a simple solution demonstrating the technique. In this example I create 2 application tasks and wait for completion of any of them. All the work is done with custom activities, defining my DSL.