Create asp.net web app to convert pdf to image

Hi,
I would like an asp.net web application making to open a pdf and render it as an image. Ideally the app will then allow the user to download the image.

If it’s possible to download a small thumbnail image with something like https://ipaddress.com/api/pdfthumb?pathtopdf

And then also render all of the pages full size using a different switch it would be great

Thanks

Andrew