using System.Diagnostics;
using Bytescout.PDF;

namespace InsertPageToPDF
{
    class Program
    {
        static void Main(string[] args)
        {
            // Open first document
            Document document1 = new Document("document1.pdf");
            document1.RegistrationName = "demo";
            document1.RegistrationKey = "demo";

            // Open second document
            Document document2 = new Document("document2.pdf");
            document2.RegistrationName = "demo";
            document2.RegistrationKey = "demo";

            // Page index to insert document
            int pageIndexToAdd = 1;

            // Add pages from document2 to document1
            for (int i = 0; i < document2.Pages.Count; ++i)
            {
                document1.Pages.Insert((pageIndexToAdd++), document2.Pages[i]);
            }

            // Save merged document
            document1.Save("MergedDocument.pdf");

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