Hi @null, sorry to hear about your troubles. The Stream Engine API is designed for experienced users and comes with limited documentation.
As you are new to Visual Studio and C#, we would recommend that you instead try using our Interaction Library API which should provide you with all the data you require for your project. In addition, we have composed a details startup guide and getting started tutorial for C# bindings also which you can find @
https://developer.tobii.com/consumer-eye-trackers-interaction-library-getting-started/
Hopefully this should get you and running using eye tracking. Please go through our guide and let us know how you get on. Best Wishes.