c# - Adding footers to existing pdf documents using iTextSharp -

i wondering if knew how add text existing pdf document using itextsharp. know question has been asked before trying add footer pages in bottom right hand corner of document, none of other posts have helped me , cannot find solid info on elsewhere.

adding footer done using pdfstamper , getovercontent() method. see twopasses.cs example. more info on example, please read chapter 6 of book.

note example assumes pages of size a4 , lower-left corner has coordinate x=0,y=0. have found other answers (tell where), didn't (tell why not). common mistake may have found while searching answer make wrong assumptions mediabox , cropbox of existing pdfs. unfortunately, you're not telling you've tried (and result risk question closed).