删除文件夹

处理了以下问题

System.IO.Directory.Delete 目录不是空的。
对路径“License.rtf”的访问被拒绝 这个文件为只读属性
当这个文件夹的子文件夹处于打开时删除失败

using System.IO;

/// <summary>
        /// 取消目录下的所有文件夹及子文件的只读属性
        /// </summary>
        /// <param name="dirPath"></param>
        private void DirectorySubFileCancelReadOnly(string dirPath)
        {
            string[] dirPathes = Directory.GetDirectories(dirPath, "*.*", SearchOption.AllDirectories);
            string[] filePathes = Directory.GetFiles(dirPath, "*.*", SearchOption.AllDirectories);
           
            foreach (var dp in dirPathes)
            {
                DirectoryInfo dir = new DirectoryInfo(dirPath);
                dir.Attributes = FileAttributes.Normal & FileAttributes.Directory;
            }
            foreach (var fp in filePathes)
            {
                File.SetAttributes(fp, System.IO.FileAttributes.Normal);
            }
        }

private void button1_Click(object sender, EventArgs e)
        {
          string s=@"D:AdministratorDocumentsMyProjectCSHARP_WinCtrlWindowsFormsApplication1inDebug我的文件夹\__history";
          try
          {
              DirectorySubFileCancelReadOnly(s);
          }
          catch (System.Exception ex)
          {
              
          }
          finally
          {
              System.IO.Directory.Delete(s, true);
          }
        }