Web API Controller method executes to end. No HTTP response. Hang : I am looking for an approach to debugging this scenario. I have verified in Fiddler that there is no HTTP response at all. To be clear, as I understand it a controller method should not simply hang, there is no exception. I have verified the lack of response in Fiddler. The method returns a valid object, verified by stepping through the code to the final return statement. If you are one of the previous down voters, I ask you to explain yourself since this is a valid question; please *think* before downvoting. - not a rookie