How to impersonate a specific user accessing to network shared directory?

Tech Tip: Click here to run a free scan for Windows Errors and optimize PC performance

From a ASP.Net application, I need to access to a remote shared
directory of a file server. Unfortunately, I must access to this file
server with a different user, not the user impersonated by the web
application.
I want that Directory.GetFiles() uses a specific user to access to the
shared directory.
Is it possible?

Thanks...

.