how fix unreadable file selected in listbox c#winform

Question

Hi, I have problem when I try to get files from a directory, but all those files contain a file doesn't exist in specific directory, I use this code for getting files

 

FileInfo[] dr_files = dr.GetFiles();


              foreach (FileInfo f in dr_files)
              {
                  listBox3.Items.Add(f);
              }

 here i get the files inlistbox but the file highlighted doesn't exist in directory

 

 when i double click to open the file that doesn't exist in directory from listbox(word file) I have this message