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Add Text Annotations in PDF - C#

PDF SDK sample in C# demonstrating ‘Add Text Annotations in PDF’

using System.Diagnostics;
using Bytescout.PDF;

namespace TextAnnotationExample
    /// <summary>
    /// This example demonstrates how to add a text annotation.
    /// </summary>
    class Program
        static void Main()
            // Create new document
            Document pdfDocument = new Document();
            pdfDocument.RegistrationName = "demo";
            pdfDocument.RegistrationKey = "demo";

            // If you wish to load an existing document uncomment the line below and comment the Add page section instead
            // pdfDocument.Load(@".\existing_document.pdf");

            // Add page
            Page page = new Page(PaperFormat.A4);

            // Add collapsed annotation (shown as a tooltip when mouse is over the icon)
            TextAnnotation collapsedAnnotation = new TextAnnotation(20, 20);
            collapsedAnnotation.Color = new ColorRGB(255, 255, 0);
            collapsedAnnotation.Icon = TextAnnotationIcon.Comment;
            collapsedAnnotation.Author = "Mr. Important";
            collapsedAnnotation.Contents = "The quick brown fox jumps over the lazy dog.";

            // Add expanded annotation
            TextAnnotation expandedAnnotation = new TextAnnotation(20, 50);
            expandedAnnotation.Color = new ColorRGB(255, 0, 0);
            expandedAnnotation.Icon = TextAnnotationIcon.Note;
            expandedAnnotation.Open = true;
            expandedAnnotation.Author = "John Doe";
            expandedAnnotation.Contents = "The quick brown fox jumps over the lazy dog.";
            // Save document to file

            // Cleanup 

            // Open result document in default associated application (for demo purpose)
            ProcessStartInfo processStartInfo = new ProcessStartInfo("result.pdf");
            processStartInfo.UseShellExecute = true;

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