title: Open, Edit and Save PDF File in C#.Net
body: <p>I have a requirement to open an existing pdf file and need to add some comments or edit existing content and save the same file.</p>
  
  <p>I spent so many hours on this and most people referred itextsharp or pdf clown but unfortunately didn't get any samples or how to use itextsharp or pdf clown to do the requirement.</p>
  
  <p>Thanks in advance</p>