How to Perform a One-Way Send with a Custom WCF LOB Adapter

I'm trying to create a basic one-way custom WCF LOB Adapter for use with BizTalk and am implementing the Execute method that gets created by the Visual Studio WCF L开发者_运维技巧OB Adapter SDK project Wizard.

The documentation for this method is summarized with the following comment, that appears right above the method :

   // Executes the request message on the target system and returns a response message.
   // If there isn’t a response, this method should return null

However, when returning null, an error is raised in BizTalk, with the following (roughly translated) message:

System.ServiceModel.CommunicationException: The server did not produce an appropriate response ; this may be due to non-matching contracts ; a premature end of the session or an internal error.

What gives ?

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I haven't used the LOB adapter SDK, but the WCF adapter in BTS doesn't support one-way services very well. You're best bet might be to return an empty message (i.e. void, but not one way, in a regular service contract.)