title: A file or folder with the name already exists Visual Studio
body: <p>I try to add a new file to my source controlled solution and receive this message:</p>
  <blockquote>
  <p>A file or folder with the name 'xxx' already exists. Please give a unique
  name to the item you are adding, or delete the existing item first.</p>
  </blockquote>
  <p>I'm 100% sure that there is no file with the given name.</p>
  <p>So how do I get VS to add items again?</p>