title: WebClient client ip address
body: <p>I have a generic handler (ashx) that return a file from the file system. This handler is not behind a login. However, I only need to return the file if the request has been made from inside another .net application via a WebClient object. 
  Essentially the user would type the ashx url in a box and click an upload button which would transfer the file securely. </p>
  
  <p>In the ashx file how do I determine if the request is coming from the "http://myapp.com/Upload.aspx"?<br>
  Thank you,
  Virgil</p>