Hi Prakash,
Thank you for using Syncfusion products,
Please use the below code to create web link in the PDF
PdfDocument document = new PdfDocument();
//Creates a new page and adds it as the last page of the document.
PdfPage page = document.Pages.Add();
//Create a new pdf textweblink annotation
PdfTextWebLink webLinkAnnotation = new PdfTextWebLink();
webLinkAnnotation.Url = "http://www.yahoo.com";
webLinkAnnotation.Text = "Click to go Yahoo";
webLinkAnnotation.Font = new PdfTrueTypeFont(new Font("Arial", 12));
webLinkAnnotation.Pen = PdfPens.Brown;
webLinkAnnotation.DrawTextWebLink(page, new PointF(50, 40));
//Add this annotation to a new page.
//Save the document to disk.
document.Save("TextWebLink.pdf");
The sample project is attached for your reference.
Please let us know if you have any concern.
With Regards,
Praveen
PDF Text web Link_2708d032.zip