Call API from c# .Net

I am looking for an example of how to call the REST/JSON Aero API from c# .Net. I am aware of one c# example on the Aero API landing page, and I have tried using that, but I am getting issues when I try to implement it. Please help as it is critical to the work I am trying to do.

This is what I have right now, and the red box is where it stops working