title: Why does ReSharper's "Rename" only sometimes display a prompt?
body: <p>When I rename a variable using ReSharper 4.5 (VS2008), the rename is performed inline (I specify the new variable name in the editor itself) or via a prompt (a popup window where I specify the new variable name).</p>
  
  <p>I'm hoping someone can tell me what determines which approach is used?</p>