//// This code is part of Document Solutions for PDF .NET demos.// Copyright (c) MESCIUS inc. All rights reserved.//using System.IO;using GrapeCity.Documents.Pdf;using GrapeCity.Documents.Pdf.Annotations;
namespace DsPdfWeb.Demos{    // This sample shows how to merge two existing PDFs into a single document.    // The method GcPdfDocument.MergeWithDocument() provides this feature,    // and allows inserting all or some pages from another PDF into the current    // document. The simplest form of this method is demonstrated in this sample,    // appending a whole PDF to the current document.    public class MergePDFs    {        public int CreatePDF(Stream stream)        {            using var fs0 = File.OpenRead(Path.Combine("Resources", "PDFs", "The-Rich-History-of-JavaScript.pdf"));            using var fs1 = File.OpenRead(Path.Combine("Resources", "PDFs", "CompleteJavaScriptBook.pdf"));
            var doc = new GcPdfDocument();            doc.Load(fs0);            // Save page count for the navigation link added below:            var pgNo = doc.Pages.Count;            var doc1 = new GcPdfDocument();            doc1.Load(fs1);            doc.MergeWithDocument(doc1, new MergeDocumentOptions());
            // Insert a note at the beginning of the document:            var page = doc.Pages.Insert(0);            var rc = Common.Util.AddNote(                "GcPdfDocument.MergeWithDocument() method allows adding to the current document all or some pages " +                "from another document.\n" +                "In this sample we load one PDF, append another whole PDF to it, and save the result.\n" +                "Click this note to jump directly to the first page of the 2nd document.",                page);
            // Link the note to the first page of the second document:            page.Annotations.Add(new LinkAnnotation(rc, new DestinationFit(pgNo + 1)));            // Done (target document must be saved BEFORE the source is disposed):            doc.Save(stream);            return doc.Pages.Count;        }    }}