You work as a Microsoft BizTalk Server 2006 Developer for Domain.com. The development of Integration applications is your responsibility at Domain.com. You received instruction to construct a custom pipeline component to process certain messages in your BizTalk application.
To work with the pipeline assemblies you need to construct, your component must run only when it is the first to match the message type. To this end you need to decide which interface would be the appropriate interface that your component should implement.

What should you do?

A.
Your component should implement the INamedItemList interface.

B.
Your component should implement the IDocumentSpec interface.

C.
Your component should implement the IFirstMatch interface.

D.
Your component should implement the IProbeMessage interface.

Explanation:
Any pipeline component, regardless of whether it is a general, assembling, or disassembling component, must implement the IProbeMessage interface if it is to have message probing capabilities. Probing components are used in pipeline stages that have FirstMatch execution mode. Thus your component should implement the IProbeMessage interface.

Incorrect Answers:
A: The INamedItemList interface is a helper interface used for accessing document elements from code. It is irrelevant when considering probing capabilities.
B: The IDocumentSpec interface is an interface that allows a component to take document-specific actions from within code. It is irrelevant when considering probing capabilities.
C: There is no IFirstMatch interface specified in Microsoft BizTalk Server 2006; and certainly none associated with custom pipeline component development. It is an execution mode.