title: File.Exists returning false from a network share
body: <p>I've been working on a ASP.NET project that is going to save uploaded files to a network share.  I figured I could just use a virtual directory and be fine, but I have been struggling with permissions for Directory.CreateDirectory.</p>
  
  <p>I was able to upload files so I decided to change my code to place everything in a single directory, however this requires me to make use of File.Exists to avoid overwriting duplicates.</p>
  
  <p>Now that I have all my code updated, I have discovered that no matter what I do, File.Exists always returns false (The file definitely exists) when I test against the network share.</p>
  
  <p>Any ideas?  I'm coming to the very end of my rope with network shares.</p>