using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections;
using System.IO;

namespace ConsoleApplication1
{
    class Program
    {
        

        static void Main(string[] args)
        {
            string str = @"E:\";
            IList<FileInfo> lst = GetFiles(str);
            foreach (var item in lst)
            {
                Console.WriteLine(item);
            }
            Console.ReadKey();
        }
        
        private static void GetFilePath(string strPath, ref List<string> al)
        {
            DirectoryInfo diFliles = new DirectoryInfo(strPath);
            DirectoryInfo[] diArr = diFliles.GetDirectories();
            foreach (DirectoryInfo di in diArr)
            {
                al.Add(di.FullName);
                GetFilePath(di.FullName, ref al);
            }
        }
        /// <summary>
        /// 遍历当前目录及子目录
        /// </summary>
        /// <param name="strPath">文件路径</param>
        /// <returns>所有文件</returns>
        private static IList<FileInfo> GetFiles(string strPath)
        {
            List<FileInfo> lst = new List<FileInfo>();
            List<string> al = new List<string>();
            try
            {
                al.Add(strPath);
                DirectoryInfo diFliles = null;
                GetFilePath(strPath,ref al);
                foreach (string str in al)
                {
                    diFliles = new DirectoryInfo(str);
                    lst.AddRange(diFliles.GetFiles());
                    
                }
            }
            catch 
            {
                //如果设为E:\aa则不会出问题
            }
            return lst;
        }
    }
}