Final answer:
In Workflow Foundation, asynchronous services are implemented with two correlated receive-send pairs, allowing for messages to be received, processed, and responded to over time, with a persistent and reliable message exchange pattern.
Correct option is C.Use two correlated receive-send pairs.
Step-by-step explanation:
In Workflow Foundation, asynchronous services are typically implemented using two correlated receive-send pairs. This method allows for a service to receive a message (the first receive), process it asynchronously, and then send a response back at a later time (the first send). The correlation is used to tie the response back to the original request. The second pair is similar, handling further communication if required.
This approach is reliable and leverages the persistence and tracking capabilities of Workflow Foundation to ensure that the message exchange pattern is maintained even in the event of system failures or restarts.