In this tutorial, we will guide you how to utilize the annotation library which provides powerful functionality to add redaction annotation to PDF using C#. The resource redaction annotation is used to selectively remove or hide sensitive content within a PDF document. The library used in this tutorial is designed to be platform-agnostic, guaranteeing that the provided code can be executed on any operating system with seamless compatibility. Here are the basic steps to incorporate redaction annotation in PDF using C#.

Steps to Add Redaction Annotation using C#

1. To add redaction annotations into PDF, install GroupDocs.Annotation for .NET using the NuGet package manager
2. To incorporate the GroupDocs.Annotation namespace into your project, you need to add a reference to it
3. Create an instance of the Annotator class by providing the path of the PDF file as an argument to its constructor
4. Create an instance of the ResourcesRedactionAnnotation class and define the necessary properties, such as the position, page number, etc.
5. Call the Add method of the Annotator class and pass the ResourcesRedactionAnnotation object as a parameter
6. Call the Annotator.Save method to save the PDF

The aforementioned steps have been outlined to assist you effortlessly insert redaction annotation in PDF using C#. These instructions are applicable to popular operating systems such as Windows, macOS, and Linux, as long as .NET is installed. Furthermore, there is no need to install any additional software. Presented below is a code example that illustrates the process of adding a redaction annotation to a PDF.

Code to Add Redaction Annotation using C#

In the above section, we demonstrated the usage of C# redaction annotation in PDF. As observed, a few API calls are all that is needed to complete this task. Once you have installed the annotation library and updated the file paths for input and output, you can effortlessly integrate the provided code into your applications.

We have already covered the procedure for adding polyline annotations to PDF files. If you wish to delve deeper into this topic, we invite you to explore our comprehensive guide on how to add polyline annotation using C#.