I'm trying to send a correlated exchange of messages using the MessageId to perform the correlation. The MessageId appears on the first message but it looks like I have to copy it around manually because it's not on the reply messages. Why isn't this working? Let's look at a simple message exchange using MessageId to see what is happening here. I'll use the WSHttpBinding to trigger the addition of a MessageId and a simple service contract with one operation. The operation has a request-reply exchange