C# 删除、遍历指定目录下的所有指定文件、文件夹

        /// <summary>
        /// 删除指定文件、文件夹

        /// </summary>
        /// <param name="dir">目录路径</param>
        /// <param name="delname">待删除文件或文件夹名称</param>
        public void DeleteFolder(string dir,string delname)
        {          
            if (Directory.Exists(dir))
            {
                foreach (string d in Directory.GetFileSystemEntries(dir))
                {
                    string tmpd = d.Substring(0, d.LastIndexOf("\\")) + "\\" + delname;
                    if (Directory.Exists(d))
                    {
                        if (d == tmpd)
                            Directory.Delete(d, true);
                        else
                            DeleteFolder(d, delname);//递归删除子文件夹  
                    }
                    else if(File.Exists(d))
                    {
                        if (d == tmpd)
                            File.Delete(d);
                    }
                }
            }           
        }

        /// <summary>
        /// 以下为遍历文件目录文件名，并保存到数组al
        /// </summary>
        public ArrayList GetAllDirList(string strBaseDir)//strBaseDir是路径
        {

            public ArrayList al = new ArrayList();//定义存储文件和文件夹名的数组(该数组用于查找指定目录的完整目录）

            DirectoryInfo di = new DirectoryInfo(strBaseDir);
            DirectoryInfo[] diA = di.GetDirectories();
            if (aaa == 0)
            {
                FileInfo[] fis2 = di.GetFiles();   //有关目录下的文件  
                for (int i2 = 0; i2 < fis2.Length; i2++)
                {
                    al.Add(fis2[i2].FullName);
                    //fis2[i2].FullName是根目录中文件的绝对地址，把它记录在ArrayList中
                }
            }
            for (int i = 0; i < diA.Length; i++)
            {
                    aaa++;
                    //al.Add(diA[i].FullName + "\t<目录>");
                    //diA[i].FullName是某个子目录的绝对地址，把它记录在ArrayList中
                    DirectoryInfo di1 = new DirectoryInfo(diA[i].FullName);
                    DirectoryInfo[] diA1 = di1.GetDirectories();
                    FileInfo[] fis1 = di1.GetFiles();   //有关目录下的文件  
                    for (int ii = 0; ii < fis1.Length; ii++)
                    {
                        al.Add(fis1[ii].FullName);
                        //fis1[ii].FullName是某个子目录中文件的绝对地址，把它记录在ArrayList中 
                    }
                    GetAllDirList(diA[i].FullName);
                    //注意：递归  
            }

           return al;
        }