Images2PDF.cs

using System;
using System.Collections.Generic;
using System.Text;
using PdfSharp.Pdf;
using PdfSharp.Drawing;
using PdfSharp;
using System.Reflection;
using System.IO;
using System.Windows.Forms;

namespace Images2PDF
{
    class Program
    {
        static void Main(string[] args)
        {

            string SavePath = new FileInfo(Application.ExecutablePath).DirectoryName + "\\Images.pdf";

            using (PdfDocument Document = new PdfDocument())
            {
                foreach (string ImagePath in args)
                {
                    Console.WriteLine(ImagePath);
                    PdfPage page = Document.AddPage();
                    page.Size = PageSize.A4;
                    using (XImage image = XImage.FromFile(ImagePath))
                    {
                        //page.Width = image.PointWidth;
                        //page.Height = image.PointHeight;
                        using (XGraphics gfx = XGraphics.FromPdfPage(page))
                        {
                            double Height = image.PointHeight * page.Width / image.PointWidth;
                            if (Height < page.Height)
                                gfx.DrawImage(image, 0, (page.Height - Height) / 2, page.Width, Height);
                            else
                            {
                                double Width = image.PointWidth * page.Height / image.PointHeight;
                                gfx.DrawImage(image, (page.Width - Width) / 2, 0, Width, page.Height);
                            }
                        }
                    }
                }
                Document.Save(SavePath);
            }
        }
    }
}