PDFsharp & MigraDoc Foundation

Is there a way to find all acrofields on a page and then delete one if it falls with some specified coordinates?

It doesn't appear you can use pdfPage to find fields. I guess they don't exist on the page but in AcroForms object.

So I need to traverse ACroForms and find each field? I'm not sure how to do that. Do I get each element then traverse that element looking for children until I find /Rect? If I knew the name of the field then I could search for it. But maybe I should get all field names then search each field name looking for elements? I just need to start by finding all AcroFields but I don't even know how to do that. Please help.