I spent quite a lot of time trying to reach information on how to request data from AWIS. Documentation is poor and there are only 4 samples out there but they only implements requests for UrlInfo action and there’s no sample for C#.
Tired of this scenario, I decided to upload a (buggy, messy but working) sample of 4 main requests.
All the important code is in this file: https://github.com/Corvalius/alexa-awis-c-sharp/blob/master/AlexaAPI/AlexaAPI/Controllers/HomeController.cs
But you can contribute in the repo by improving the sample with other features that you might like. https://github.com/Corvalius/alexa-awis-c-sharp