C#

DirectoryInfo dir = new DirectoryInfo(@"c:\");
FileInfo[] files = dir.GetFiles();

Array.Reverse(files);

foreach(FileInfo file in files)
{
	Console.WriteLine(file.Name);
}

Console.ReadLine();

using System;
using System.Collections;
using System.IO;

public class CompareFileInfo : IComparer
{
	int IComparer.Compare(object first, object second)
	{
		FileInfo file1 = (FileInfo)first;
		FileInfo file2 = (FileInfo)second;
		
		return string.Compare(file1.Name, file2.Name);
	
	}
}

public class MyClass
{
	public static void Main()
	{
		DirectoryInfo dir = new DirectoryInfo(@"c:\");
		FileInfo[] files = dir.GetFiles();
		Array.Sort(files, new CompareFileInfo());
		Array.Reverse(files);
		foreach(FileInfo file in files)
		{
			Console.WriteLine(file.Name);
		}
	}
}