获取文件信息出现UnauthorizedAccessException异常
截取出问题的一段,想要获得文件的大小,请问有没有什么方法加个IF语句半段d.fullname的属性是否非只读?

private void Form3_Load(object sender, EventArgs e)

        {

            string path;

            textBox1.Text = DriveInfo.GetDrives()[g].Name;

            path = DriveInfo.GetDrives()[g].Name;

            DirectoryInfo files = new DirectoryInfo(path);

            DirectoryInfo[] dinfo = files.GetDirectories();

            try

            {

               

                foreach (DirectoryInfo d in dinfo)

                //if(File.Open(d.FullName, FileMode.Open).

                {

                   

                    File.SetAttributes(d.FullName, FileAttributes.Normal);

                    dataGridView1.Rows.Add(

                        d, File.Open(d.FullName, FileMode.Open).Length

                        );

                }

            }

            catch (UnauthorizedAccessException x)

            {

                MessageBox.Show("NO ACCESS");

                

            }