title: asp.net MVC open file from folder and view info such as extentsion and contenttype etc
body: <p>HI there</p>
  
  <p>I know how to get details from a file when i am uploading it, but am unsure how to do this when the file is already on
  the server and i wish to get information like size, contentType etc</p>
  
  <p>drawn a blank much appreciated.</p>
  
  <p>thanks</p>