我想写一个程序，用到app.setting,使得文件夹里面没有数据的自动删除，最后一次修改与现在时间差10天的自动删除，请赐教谢谢～～～

就是相当一个自动删除的工具 ，文件夹里面没东西就删掉，最后一次访问时间超过多少就删掉，现在部分问题解决了，如下问题是：
1、怎么配置app。setting，没有用到啊感觉，但是上面要求用到这个
2、我要是有一个文件夹的子文件夹有内容怎么判断，要是文件在最深一层，那查起来太麻烦了吧，谢谢


代码：
using System;
using System.Collections.Generic;
using System.Text;
using

namespace timespans
{
    class Program
    {
        static void Main(string[] args)
        {
            DirectoryInfo di = new DirectoryInfo("F:\\win03\\");
            // Get a reference to each file in that directory.
            FileInfo[] fiArr = di.GetFiles();
            DirectoryInfo[] diArr =di.GetDirectories();
            // Display the names of the files.
            foreach (FileInfo fri in fiArr)
            {
                DateTime DateTime2 = DateTime.Now;//现在时间  
                DateTime DateTime1 = fri.LastWriteTime;
                //DateTime1 = Convert.ToDateTime(); //设置要求的减的时间              
                string dateDiff = null;
                TimeSpan ts1 = new TimeSpan(DateTime1.Ticks);
                TimeSpan ts2 = new TimeSpan(DateTime2.Ticks);
                TimeSpan ts = ts1.Subtract(ts2).Duration();              //显示时间            
                dateDiff = ts.Days.ToString() + "天" + ts.Hours.ToString() + "小时" + ts.Minutes.ToString() + "分钟" + ts.Seconds.ToString() + "秒";
                Console.WriteLine(dateDiff);
                Console.WriteLine(fri.Name);

                if (ts.Days > 10)
                {
                    Console.WriteLine("timeout!,it has been deleted");
                    fri.Delete();
                }
            }
            foreach (DirectoryInfo dri in diArr)
            {
                Console.WriteLine(dri.Name);
            }

            int count = di.GetFiles().Length;
            int count2 = di.GetDirectories().Length;
            if (count == 0 && count2 == 0)
            {
                Console.WriteLine("no files and folders! it has been deleted");
                di.Delete();
            }

            Console.WriteLine("files: " + count);
            Console.WriteLine("folder: " + count2);
        }
    }
}

using System;
using System.Collections.Generic;
using System.Text;
using

namespace timespans
{
    class Program
    {

     static bool CheckFolderIsNull(DirectoryInfo di)
        {
            // Get a reference to each file in that directory.
            FileInfo[] fiArr = di.GetFiles("F:\\win03\\");
            // Get a reference to each subdirectory in that directory.
            DirectoryInfo[] diArr = di.GetDirectories("F:\\win03\\");
            DateTime DateTime2;
            DateTime DateTime1;   
            string dateDiff = null;
            TimeSpan ts;
            foreach (FileInfo fri in fiArr)
            {

                DateTime2 = DateTime.Now;//现在时间  
                DateTime1 = fri.LastWriteTime;
                TimeSpan ts1 = new TimeSpan(DateTime1.Ticks);
                TimeSpan ts2 = new TimeSpan(DateTime2.Ticks);
                ts = ts1.Subtract(ts2).Duration();              //显示时间  
                //DateTime1 = Convert.ToDateTime(); //设置要求的减的时间              

                dateDiff = "该文件距离上次访问时间相差：" + ts.Days.ToString() + "天" + ts.Hours.ToString() + "小时" + ts.Minutes.ToString() + "分钟" + ts.Seconds.ToString() + "秒";
                Console.WriteLine(fri.Name + " " + dateDiff);

                if (diArr.Length != 0 || ts.Days <= 10)
                {
                    foreach (DirectoryInfo d in diArr)
                    {
                        if (!CheckFolderIsNull(d))
                        {
                            return false;
                        }
                    }
                }
              
                if (fiArr.Length > 0 || ts.Days <= 10)
                {
                    return false;
                }
                else
                {
                    di.Delete();
                    Console.WriteLine("已经清理多余文件！");
                    return true;
                }
            }
        }


        static void Main(string[] args)
        {
            int count = di.GetFiles().Length;
            int count2 = di.GetDirectories().Length;
            DirectoryInfo di;

            Console.WriteLine("before files: " + count);
            Console.WriteLine("before folder: " + count2);
            
            
            CheckFolderIsNull(di);


            Console.WriteLine("after files: " + count);
            Console.WriteLine("after folder: " + count2);
        }

    }
}

添加了递归函数的调用 还是没出来 望高手赐教（更正）。

恩...就是要每次递归都在win03里，在他里面在找他的子文件夹，请问如何改 谢谢