In this article, we’ll provide you with a concise guide on how to add polyline annotation using C#. In many cases, it is necessary to add annotations to PDF documents to provide additional information or highlight specific areas of document. One type of annotation that is commonly used is the Polyline annotation. We’ll provide you with a practical example that demonstrates how to add polyline annotation in C#. This article includes a step-by-step process and sample code to guide you through the process of adding polyline annotations.

Steps to Add Polyline Annotation using C#

1. Install GroupDocs.Annotation for .NET via the NuGet package manager to add polyline annotation into PDF
2. Add reference of GroupDocs.Annotation namespace in your project
3. Instantiate the Annotator class by passing the PDF file’s path as an argument to its constructor
4. Create an instance of the PolylineAnnotation class and define the necessary properties, such as the position and SVG path
5. Call the Add method of the Annotator class and provide the PolylineAnnotation object as a parameter
6. Call the Annotator.Save method to save the final output PDF

We’ve outlined the steps above to help you easily add the polyline annotation C# feature. You can use these instructions on popular operating systems like Windows, macOS, and Linux as long as .NET is installed. Moreover, you won’t need to install any extra software. Below is a code example that demonstrates how to add polyline annotation to a PDF.

Code to Add Polyline Annotation using C#

In the previous example, we showcased how to use C# code for polyline annotation. As you can see, we only need to make a few API calls to accomplish this task. After installing the annotation library and updating the input and output file paths, you can seamlessly incorporate the provided code into your applications. Additionally, you have the option to include other types of annotations, such as Area, Arrow, Distance, Highlight, Link, Replacement, Strikeout, and many more.

We’ve already discussed the process of adding strikeout annotations to PDF files. If you want to learn more about this topic, please check out our guide on how to add strikeout annotation in PDF using C#.