如何处理运用某一路径之下文件夹

/*
               #########                       
              ############                     
              #############                    
             ##  ###########                   
            ###  ###### #####                  
            ### #######   ####                 
           ###  ########## ####                
          ####  ########### ####               
         ####   ###########  #####             
        #####   ### ########   #####           
       #####   ###   ########   ######         
      ######   ###  ###########   ######       
     ######   #### ##############  ######      
    #######  #####################  ######     
    #######  ######################  ######    
   #######  ###### #################  ######   
   #######  ###### ###### #########   ######   
   #######    ##  ######   ######     ######   
   #######        ######    #####     #####    
    ######        #####     #####     ####     
     #####        ####      #####     ###      
      #####       ###        ###      #        
        ###       ###        ###              
         ##       ###        ###               
__________#_______####_______####______________

                我们的未来没有BUG              
* ==============================================================================
* Filename: Text
* Created:  2016/4/26 11:45
* Author:   HaYaShi WangYuChen
* ==============================================================================
*/
using UnityEngine;
using System.Collections;
using System.IO;
using System;

public class Text : MonoBehaviour {
    /// <summary>
    /// 通过判断获取该父文件夹文件数量或所有子父文件夹文件数量
    /// </summary>
    /// <param name="physicelPath">传入的是物理路径</param>
    /// <param name="isIncludeSubDirectory"></param>
    /// <returns></returns>
    public static int FileCount(string physicelPath, bool isIncludeSubDirectory)
    {
        int count = 0;
        if (isIncludeSubDirectory)
        {
            //该父文件夹文件数量以及所有子文件夹文件数量
            count = Directory.GetFiles(physicelPath, "*.*", SearchOption.AllDirectories).Length;
        }
        else
        {
            //该父文件夹文件数量
            count = Directory.GetFiles(physicelPath, "*.*", SearchOption.TopDirectoryOnly).Length;
        }
        return count;
    }

    /// <summary>
    /// 通过判断获取该父文件夹数量或所有子父文件夹数量
    /// </summary>
    /// <param name="physicelPath">传的是布尔值的参数</param>
    /// <param name="isIncludeSubDirectory"></param>
    /// <returns></returns>
    public static int DirectoryCount(string physicelPath, bool isIncludeSubDirectory)
    {
        int count = 0;
        if (isIncludeSubDirectory)
        {
            //该父文件夹数量以及所有子文件夹数量
            count = Directory.GetDirectories(physicelPath, "*.*", SearchOption.AllDirectories).Length;
        }
        else
        {
            //该父文件夹数量
            count = Directory.GetDirectories(physicelPath, "*.*", SearchOption.TopDirectoryOnly).Length;
        }
        return count;
    }

    /// <summary>
    /// 获取某一目录之下所有文件的大小
    /// </summary>
    /// <param name="physicelPath">文件夹路径</param>
    /// <returns></returns>
    public static long TotalFileSizes(string physicelPath)
    {
        string[] a = Directory.GetFiles(physicelPath, "*.*", SearchOption.AllDirectories);
        //Directory.GetFiles(@"D:\Test", "*.jpg", SearchOption.AllDirectories); //找出该目录（及下级）所有JPG文件
        long b = 0;
        foreach (var item in a)
        {
            FileInfo info = new FileInfo(item);
            b += info.Length;
        }
        return b;
    }

    /// <summary>
    /// 操作文件夹，删除所有空文件夹
    /// </summary>
    /// <param name="physicalpath">物理路径</param>
    public static void RemoveAllEmptyDirectories(string physicalpath)
    {
        //遍历旗下子文件夹
        foreach (var item in Directory.GetDirectories(physicalpath))
        {
            //循环遍历旗下子文件夹
            RemoveAllEmptyDirectories(item);
            //判断文件夹里面文件为空      同时  判断旗下子文件夹里面文件为空   
            if (Directory.GetFiles(item).Length == 0 && Directory.GetDirectories(item).Length == 0)
            {
                //删除文件
                Directory.Delete(item, false);
            }
        }
    }
    /// <summary>
    /// 删除某一路径之下所有文件夹下文件
    /// </summary>
    /// <param name="physicalPath">物理路径</param>
    public static void DeleteAllFiles(string physicalPath) {
        DirectoryInfo id = new DirectoryInfo(physicalPath);
        //遍历删除此文件夹下的文件
        foreach (FileInfo item in id.GetFiles())
        {
            item.Delete();
        }
        //遍历子文件夹数组
        foreach (DirectoryInfo item in id.GetDirectories())
        {
            DeleteAllFiles(item.FullName);
        }
    }

    /// <summary>
    ///  删除某一路径之下 days天之内所有文件夹下文件
    /// </summary>
    /// <param name="physicalPath">物理路径</param>
    /// <param name="days">天数</param>
    public static void DeleteAllFilesDays(string physicalPath, int days) {
        int day = -(Math.Abs(days));
        DirectoryInfo id = new DirectoryInfo(physicalPath);
        //遍历删除此文件夹下的文件
        foreach (FileInfo item in id.GetFiles())
        {
            Debug.Log("文件创建时间"+item.CreationTime);
            Debug.Log("前" + days + "天现在时间" + DateTime.Now.AddDays(day));
            //判断文件是否大于前days时间
            if (item.CreationTime>DateTime.Now.AddDays(day))
            {
                item.Delete();
            }
        }
        //遍历子文件夹数组
        foreach (DirectoryInfo item in id.GetDirectories())
        {
            DeleteAllFilesDays(item.FullName,days);
        }
    }
	void Start () {
        //Debug.Log(TotalFileSizes("C:\\Users\\EasyAR\\Desktop\\Text")+"：字节");
        //Debug.Log("该父文件夹文件数量以及所有子文件夹文件数量" + FileCount("D:\\hahaha", true));
        //Debug.Log("该父文件夹文件数量" + FileCount("D:\\hahaha", false));
        //Debug.Log("该父文件夹数量以及所有子文件夹数量" + DirectoryCount("D:\\hahaha", true));
        //Debug.Log("该父文件夹数量" + DirectoryCount("D:\\hahaha", false));
        //Debug.Log(TotalFileSizes("C:\\Users\\EasyAR\\Desktop\\Text") + "：字节");
        //RemoveAllEmptyDirectories("D:\\hahaha\\xixixi");
        //DeleteAllFiles("D:\\hahaha\\xixixi");
        //DeleteAllFilesDays("D:\\hahaha\\xixixi",10);
    }
}

　　最近对获取文件夹研究一下，总结了一点，希望你们有用。