// Initialize list of AnnotationInfo
List<AnnotationInfo> annotations = new List<AnnotationInfo>();
// Initialize text annotation
AnnotationInfo textAnnotation = new AnnotationInfo
{
  Box = new Rectangle((float)265.44, (float)153.86, 206, 36), Type = AnnotationType.Text
};
// Add annotation to list
annotations.Add(textAnnotation);
// Get input file stream
Stream inputFile = new FileStream("D:/input.pdf", FileMode.Open, FileAccess.ReadWrite);
// Export annotation and save the output file
CommonUtilities.SaveOutputDocument(inputFile, annotations, DocumentType.Pdf);

IRON VB CONVERTER ERROR developers@ironsoftware.com

using PdfDocument Pdf = PdfDocument.FromFile("existing.pdf");// Create a PDF annotation object
var Annotation = new IronPdf.Annotations.TextAnnotation()
{
    Title = "This is the major title",
    Subject = "This is a subtitle",
    Contents = "This is the long 'sticky note' comment content...",
    Icon = IronPdf.Annotations.TextAnnotation.AnnotationIcon.Help,
    Opacity = 0.9,
    Printable = false,
    Hidden = false,
    OpenByDefault = true,
    ReadOnly = false,
    Rotateable = true
};

// Add the annotation "sticky note" to a specific page and location within any new or existing PDF.
Pdf.AddTextAnnotation(Annotation, 1, 150, 250);
Pdf.SaveAs("existing.pdf");

Using Pdf As PdfDocument = PdfDocument.FromFile("existing.pdf") ' Create a PDF annotation object
	Dim Annotation = New IronPdf.Annotations.TextAnnotation() With {
		.Title = "This is the major title",
		.Subject = "This is a subtitle",
		.Contents = "This is the long 'sticky note' comment content...",
		.Icon = IronPdf.Annotations.TextAnnotation.AnnotationIcon.Help,
		.Opacity = 0.9,
		.Printable = False,
		.Hidden = False,
		.OpenByDefault = True,
		.ReadOnly = False,
		.Rotateable = True
	}
	
	' Add the annotation "sticky note" to a specific page and location within any new or existing PDF.
	Pdf.AddTextAnnotation(Annotation, 1, 150, 250)
	Pdf.SaveAs("existing.pdf")
End Using

using System;
using GroupDocs.Conversion.Options.Convert;
namespace ConvertXlsbToPdfInCSharp
{
    class Program
    {
        public static void Main(string [] args)
        {
            // Load license
            string licensePath = "GroupDocs.Conversion.lic";
            GroupDocs.Conversion.License lic = new GroupDocs.Conversion.License();
            lic.SetLicense(licensePath);

            // Load source XLSB for conversion
            var converter = new GroupDocs.Conversion.Converter("sample.xlsb");

            // Conversion options
            var convertOptions = new PdfConvertOptions();

            // Convert XLSB to PDF
            converter.Convert("converted.pdf", convertOptions);
            Console.WriteLine("Done");
        }
    }
}

Imports System
Imports GroupDocs.Conversion.Options.Convert
Namespace ConvertXlsbToPdfInCSharp
	Friend Class Program
		Public Shared Sub Main(ByVal args() As String)
			' Load license
			Dim licensePath As String = "GroupDocs.Conversion.lic"
			Dim lic As New GroupDocs.Conversion.License()
			lic.SetLicense(licensePath)

			' Load source XLSB for conversion
			Dim converter = New GroupDocs.Conversion.Converter("sample.xlsb")

			' Conversion options
			Dim convertOptions = New PdfConvertOptions()

			' Convert XLSB to PDF
			converter.Convert("converted.pdf", convertOptions)
			Console.WriteLine("Done")
		End Sub
	End Class
End Namespace

using System;
using GroupDocs.Conversion.Options.Convert;

namespace ConvertHtmlToPdfInCSharp
{
    class Program
    {
        public static void Main(string [] args)
        {
            // Use license
            string licensePath = "GroupDocs.Conversion.lic";
            GroupDocs.Conversion.License lic = new GroupDocs.Conversion.License();
            lic.SetLicense(licensePath);

            // Load HTML document
            var converter = new GroupDocs.Conversion.Converter("sample.html");

            // PDF options
            var convertOptions = new PdfConvertOptions();

            // HTML to PDF
            converter.Convert("converted.pdf", convertOptions);
            Console.WriteLine("Done");
        }
    }
}

Imports System
Imports GroupDocs.Conversion.Options.Convert

Namespace ConvertHtmlToPdfInCSharp
	Friend Class Program
		Public Shared Sub Main(ByVal args() As String)
			' Use license
			Dim licensePath As String = "GroupDocs.Conversion.lic"
			Dim lic As New GroupDocs.Conversion.License()
			lic.SetLicense(licensePath)

			' Load HTML document
			Dim converter = New GroupDocs.Conversion.Converter("sample.html")

			' PDF options
			Dim convertOptions = New PdfConvertOptions()

			' HTML to PDF
			converter.Convert("converted.pdf", convertOptions)
			Console.WriteLine("Done")
		End Sub
	End Class
End Namespace

using IronPdf;
var Renderer = new IronPdf.ChromePdfRenderer();
using var PDF = Renderer.RenderHtmlAsPdf("<h1>Html with CSS and Images</h1>");
PDF.SaveAs("pixel-perfect.pdf");

Imports IronPdf
Private Renderer = New IronPdf.ChromePdfRenderer()
Private PDF = Renderer.RenderHtmlAsPdf("<h1>Html with CSS and Images</h1>")
PDF.SaveAs("pixel-perfect.pdf")

using IronPdf;
IronPdf.ChromePdfRenderer Renderer = new IronPdf.ChromePdfRenderer();
using var Pdf = Renderer.RenderUrlAsPdf("https://ironpdf.com/");

Pdf.SaveAs("url.pdf");

Imports IronPdf
Private Renderer As New IronPdf.ChromePdfRenderer()
Private Pdf = Renderer.RenderUrlAsPdf("https://ironpdf.com/")

Pdf.SaveAs("url.pdf")