How to Convert Mixed Type of Images to PDF in C# .NET?

using System;
using PQScan.ImageToPDF;
namespace MixedTypeImageToPDF
{
    class Program
    {
        static void Main(string[] args)
        {
            // Create an instance of PQScan.ImageToPDF.PDFConverter object.
            PDFConverter converter = new PDFConverter();

            // Define PDF page layout. A4 is the most commonly used one.
            converter.PageSizeType = PageSizeMode.A4;

            // Set Jpeg and Bmp image types as input files.
            string[] imgFiles = newstring[2] { "input1.jpg", "input2.bmp" };

            // Give a name to output PDF document.
            string outFile = "mixed-type.pdf";

            // Convert to PDF from these two mixed image types.
            converter.CreatePDF(imgFiles, outFile);
        }
    }
}

using System;
using PQScan.ImageToPDF;

namespace AppendMixedTypeImageToPDF
{
    class Program
    {
        static void Main(string[] args)
        {
            // Create an instance of PQScan.ImageToPDF.PDFConverter object.
            PDFConverter converter = new PDFConverter();

            // Customize PDF pages layout. If set to ImageSize, 
            // PDF pages will has the original size and quality of source images.
            converter.PageSizeType = PageSizeMode.ImageSize;

            // Define mixed image types: Tiff, Png and Gif.
            string[] imgFiles = new string[3] { "input1.tif", "input2.png" , "input3.gif"  };

            // Customize output PDF file name.
            string outFile = "append-to-existed.pdf";

            // Append and merge these three types of image files to PDF.
            converter.AppendToPDF(imgFiles, outFile);
        }
    }
}