This example shows how to get a list of file names from a directory (including subdirectories).

using System.IO;
using System;

namespace CSharpFilesAndStreams
{
    class Program
    {
        static void Main(string[] args)
        {
            DisplayImageFiles();
        }
        static void DisplayImageFiles()
        {
            DirectoryInfo dir = new DirectoryInfo(@"C:\Windows\Web\Wallpaper");

            // Get all files with a *.jpg extension.
            FileInfo[] imageFiles = dir.GetFiles("*.jpg", SearchOption.AllDirectories);

            // How many were found?
            Console.WriteLine("Found {0} *.jpg files\n", imageFiles.Length);
            
            // Now print out info for each file.
            foreach (FileInfo f in imageFiles)
            {
                Console.WriteLine("***************************");
                Console.WriteLine("File name: {0}", f.Name);
                Console.WriteLine("File size: {0}", f.Length);
                Console.WriteLine("Creation: {0}", f.CreationTime);
                Console.WriteLine("Attributes: {0}", f.Attributes);
            }
        }
    }
}