A list of queues that match to this work item. If this list is null or empty, the item will be assigned to an available worker after that worker has executed all matching items.

A stub description of the work, to be passed to the worker when the work is assigned. Once the worker is assigned the stub is converted to a TWorkDescription using the derived ExpandWorkItem method; this allows for the case that the work item description is dependent on which worker is chosen to execute it