Hi @tahirsiddique, thanks for getting in touch. We don’t have out of the box solution for scrolling whilst reading as each application would need native support so as you mentioned that you are a C# developer, I would recommend you check out the Tobii Interaction Library @ https://developer.tobii.com/product-integration/interaction-library/
Thereafter the simplest approach may be to create a WPF form that imports a text document and that scrolls according to the gaze location on the form with some buffer of error to allow for saccades.
Please let us know your thoughts on this approach and if you think it will be suitable for your needs. Best Wishes.