I already wrote about this lack on my following blog post ...
Today there isn't an official IoT Hub client for .Net Micro Framework and the current C# based can't work as is because it uses Task and async/await programming model a lot. Other reason is that the current client uses a closed source AMQP library that can't work on .Net MF instead of the AMQP .Net Lite.
For the above reasons a board can't be certified if they don't have a client for testing.
My intention is to develop a new library or porting the current C# based that uses the AMQP .Net Lite for the underlying protocol. I'm already able to access IoT Hub using it but it's useful to have a client with same APIs as official one.
However, there is a pull request for an HTTP based client on GitHub : https://github.com/A...ot-sdks/pull/38