Get all files under a directory recursively

GetFilesRecursive.cs

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

public class Tester
{
	static List<FileInfo> GetFilesRecursive(string path, string matchFormat = "*")
	{
		var files = new List<FileInfo>();
		var lookups = new Stack<DirectoryInfo>(new [] { new DirectoryInfo(path) });

		while(lookups.Count > 0) {
			var lookup = lookups.Pop();
			var dirs = lookup.GetDirectories();
			foreach(var dir in dirs) {
				lookups.Push(dir);
			}
			files.AddRange(lookup.GetFiles(matchFormat));
		}
		return files;
	}
}