Card printer

Program.cs

using System;
using System.Drawing;
using System.Drawing.Printing;
using System.IO;
using System.Linq;
using System.Threading;

namespace CardPrinter {
    class Program {
        private const string FOLDER_PATH = @"D:\Downloads\badges\Avers";
        private const string FILE_MASK = "*.jpg";
        private const string PRINTER_NAME = "Zebra ZXP Series 3 USB Card Printer";
        private const string PAPER_SIZE = "86mmx54mm Card";
        private const bool REVERSE_ORDER = false;
        private const int WAIT_SECONDS = 20;

        static void Main(string[] args) {
            // Get all files in folder
            var dir = new DirectoryInfo(FOLDER_PATH);
            var files = dir.GetFiles(FILE_MASK).Select(x => x.FullName).ToArray();
#pragma warning disable CS0162 // Unreachable code detected
            if (REVERSE_ORDER) Array.Reverse(files);
#pragma warning restore CS0162 // Unreachable code detected
            Console.WriteLine($"Found {files.Length} files to print");
            Console.WriteLine("Press ENTER to start");
            Console.ReadLine();

            // Print the files
            for (var i = 0; i < files.Length; i++) {
                var fileName = Path.GetFileName(files[i]);
                Console.Write($"Printing file {fileName} ({i+1}/{files.Length})...");
                var doc = new PrintDocument() {
                    DocumentName = fileName,
                    PrinterSettings = new PrinterSettings {
                        PrinterName = PRINTER_NAME
                    }
                };
                doc.DefaultPageSettings.PaperSize = doc.PrinterSettings.PaperSizes.OfType<PaperSize>().Single(x => x.PaperName.Equals(PAPER_SIZE));
                doc.PrintPage += (s, e) => {
                    var image = Image.FromFile(files[i]);
                    var g = e.Graphics;
                    g.DrawImage(image, e.PageBounds);
                };
                doc.Print();
                Console.WriteLine("OK");
                Thread.Sleep(TimeSpan.FromSeconds(WAIT_SECONDS));
            }

        }
    }
}