C# 删除指定目录下的 所有指定文件、文件夹

        /// <summary>
        /// 删除文件
        /// </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);
                    }
                }
            }
        }