itextsharp - flatten annotation -

itextsharp - flatten annotation -

here need achieve.

i received pdf customers, contains stamp, note etc... within pdf.

so need flatten annotations become part of pdf.

i know can flatten form field using itextsharp cannot straight flatten annotation.

someone told me accomplish need o add together appearance of annotation content stream, instance pdfstamper, , throw away annotation.

someone have clue of accomplish nice.

thank you

itextsharp