How to Password Protect PDF Documents in C#

PDF documents contain important information, and it's crucial to keep them secure by adding password protection. In C#, you can implement this by using libraries like iTextSharp. Below is a step-by-step guide on how to password protect PDF documents in C#:

1. Install iTextSharp library in your C# project.
2. Import the necessary namespaces in your C# code.
3. Load the existing PDF document using iTextSharp.
4. Set the password protection options such as encryption strength and permissions.
5. Save the updated PDF document with password protection enabled.

By following these steps, you can easily add password protection to your PDF documents in C# and enhance the security of your sensitive information.