title: how to identify the extension/type of the file using C#?
body: <p>i have a workflow where user is allowed to upload any file and then that file will be read. </p>
  
  <p>Now my question is if user have image file xyz.jpg and he renamed it to xyz only (extension removed) in this can we still get the type/extension of the file using/reading files data/metadata.</p>
  
  <p>Thanks all</p>