The InkAnnotation class can be used to add free-hand text to a PDF. The InkAnnotation.Paths property is used to render the annotation's content which is specified by discrete points that should be connected when a PDF viewer renders them. The points can be connected either by straight or curved lines depending on the viewer implementation.
Steps to Complete:
1. Create an InkAnnotation instance:
2. Scribble ‘ink’ text on the PDF:
3. Add annotation to the Page
where page is the Page class instance representing a page of the document.