.NET library that adds, edits, and removes annotations and markup — area and shape annotations, text highlight/underline/strikeout, watermarks, image and link stamps, and threaded comments — on Pdf, Word, Excel, PowerPoint, images, Cad, Visio, and email files. No Microsoft Office or Adobe Acrobat required....annotation to the first page of a PDF using ( Annotator annotator =...= new Annotator ( "input.pdf" )) { AreaAnnotation area = new...