Merge JPEG Images and Save them as PDF in C#

mergeJPEGImagesAndSaveAsPDF.cs

// An array of images you want to merge.
string[] imagePaths = { "Image1.jpeg", "Image2.jpg" };

string outputPath = "MergeHorizontalAsPDF";
string tempFilePath = "temp.jpg";

// Getting resulting image size.
List<Size> imageSizes = new List<Size>();
foreach (string imagePath in imagePaths)
{
    using (RasterImage image = (RasterImage)Image.Load(imagePath))
    {
        imageSizes.Add(image.Size);
    }
}

// Width and height of the resulting image.
int newWidth = imageSizes.Sum(size => size.Width);
int newHeight = imageSizes.Max(size => size.Height);

// Merging images into one.
Source tempFileSource = new FileCreateSource(tempFilePath, isTemporal: true);
JpegOptions options = new JpegOptions() { Source = tempFileSource, Quality = 100 };
using (JpegImage newImage = (JpegImage)Image.Create(options, newWidth, newHeight))
{
    int stitchedWidth = 0;
    foreach (string imagePath in imagePaths)
    {
        using (RasterImage image = (RasterImage)Image.Load(imagePath))
        {
            Rectangle bounds = new Rectangle(stitchedWidth, 0, image.Width, image.Height);
            newImage.SaveArgb32Pixels(bounds, image.LoadArgb32Pixels(image.Bounds));
            stitchedWidth += image.Width;
        }
    }

    newImage.Save(outputPath + ".pdf", new PdfOptions());
}