title: Get a permanent URL of file in OneDrive using .NET Live SDK
body: <p>Some files in OneDrive have an attribute called 'Source' and accroding a documentation it's a Preauthenticated URL and they expire and should not be stored or reused later.
  So my question is using Live SDK for .NET how can I get a permanent URL of the file (ex. jpg image) I uploaded and use this link all the time I want? </p>
  
  <p>NOTE: this URL must not be dependent from my Live account and I usually use these links in BitmapImage and provide them for other users.</p>
  
  <p>Thanks</p>