How to use the IPDFPageInserter class

/* -----------------------------------------------------------------------
 *  <copyright file="Program.cs" company="Global Graphics Software Ltd">
 *      Copyright (c) 2024 Global Graphics Software Ltd. All rights reserved.
 *  </copyright>
 *  <summary>
 *  This example is provided on an "as is" basis and without warranty of any kind.
 *  Global Graphics Software Ltd. does not warrant or make any representations regarding the use or
 *  results of use of this example.
 *  </summary>
 * -----------------------------------------------------------------------
 */

using System.Diagnostics;
using JawsMako;
using static JawsMako.jawsmakoIF_csharp;

namespace AddCoverPage;

internal class Program
{
    static int Main()
    {
        var testFilepath = @"..\..\..\..\..\TestFiles\";
        var fileThatNeedsACover = testFilepath + "DocumentBeforeCoverPage.pdf";
        var fileThatNowHasACover = testFilepath + "DocumentAfterCoverPage.pdf";
        var coverPageFile = testFilepath + "CoverPage.pdf";

        try
        {
            // Create Mako instance
            var mako = IJawsMako.create();
            IJawsMako.enableAllFeatures(mako);

            var stopWatch = new Stopwatch();
            stopWatch.Start();

            // File we want to insert into
            var inputStream = IInputStream.createFromFile(mako, fileThatNeedsACover);

            // File we want to get our cover page from 
            var insertStream = IInputStream.createFromFile(mako, coverPageFile);

            // Create inserter
            IPDFPageInserter pageInserter = IPDFPageInserter.create(mako, inputStream);

            // Do the insertion - page numbers are zero-based
            pageInserter.insert(insertStream, 0, 0, 1);

            // And save
            pageInserter.save(IOutputStream.createToFile(mako, fileThatNowHasACover));

            Console.WriteLine($"Processing time: {stopWatch.ElapsedMilliseconds / 1000.0:F4} seconds.");
            stopWatch.Stop();
        }
        catch (MakoException e)
        {
            Console.WriteLine($"Mako exception thrown: {getEDLErrorString(e.m_errorCode)}");
            return 1;
        }

        catch (Exception e)
        {
            Console.WriteLine($"Exception thrown: {e}");
            return 1;
        }

        return 0;
    }
}