Great that you are up and running with the eye tracker. I assume it is the EyeX Controller. The Gaze SDK version on the website is not 100% updated for the EyeX Controller, but we are working on a new release.
However, the MinimalTrackerNet example should work fine. Just use –auto as a parameter (with two dashes)
Otherwise, if you want to work with C# you can check out the EyeX SDK for Unity. It contains some samples for the Mono environment that you can compile and run with Visual Studio.