title: how to find the timestamp of an online pdf file using c#?
body: <p>I am writing an application that would download and replace a pdf file only if the timestamp is newer than that of the already existing one ... </p>
  
  <p>I know its possible to read the time stamp of a file on a local computer via the code line below, </p>
  
  <pre><code>MessageBox.Show(File.GetCreationTime("C:\\test.pdf").ToString());
  </code></pre>
  
  <p>is it possible to read the timestamp of a file that is online  without downloading it .. ?</p>