title: How to open the password protected pdf using c#
body: <p>I want to open password protected pdf inside c#.net windows application panel or with adobe reader. </p>
  
  <p>My idea is I want to pass the password via system and open the pdf. Users can see the pdf but cannot save. Even users can do save us in their computer, when they re-open the pdf, the file will ask the password. Meaning that when they want to read the pdf, they must use the system and if they took the pdf to outside, they cannot open cos of the password.</p>
  
  <p>I tried with Adobe Pdf dll, this one cannot pass the password.
  And I also tried with itextsharp, this one can pass the password but after pass password, need to save the pdf. So when I open the pdf, the file has no password.</p>
  
  <p>I want to directly open the password protected pdf via system. I don't want to save again.</p>