}
The key, at least for me, was the line which decodes the token received from ACS. Note – ParseAndShowResult() is simply a helper method to parse the result of the service call and show on the phone, so nothing exciting going on there.
In the end, this wasn’t all that bad. The problems for me were really related to a lack of understanding of what was needed with regards to authenticating with ACS and likely a little inexperience in working with REST services. Hopefully this quick sample will save someone else from some frustrating 2:00 AM coding sessions.