title: Disable signature field in pdf using c#
body: <p>i am creating a pdf tablet application in that according to the users login. Signature field should be visible. for example,if student login to pdf application,student signature field should be visible(can edit) to him.Staff signature field should be disable(cant edit).According to the users login i need to read the signature field.</p>
  
  <p>thanks in advance</p>
  
  <p>pl help me </p>