title: Opening downloaded file from IE in C#
body: <p>We have created an application that registers a custom file extension, and we have client's asking to download it from a web server.  We register the extension on the web server with a MIME type (octet), and it serves it correctly.  IE9 and Chrome both launch the application successfully; IE8 seems to lock the file if the user chooses "Open" from the "Save/Open" dialog.  Is there a way to get IE to release this lock (or whatever)?</p>