title: How to delete folder with 'illegal' name in SVN via Tortoise (Windows)
body: <p>Somehow, and I have no idea how, I have managed to create a folder in our SVN repo called "C:"</p>
  
  <p>This is preventing me from updating my working copy - I get the error</p>
  
  <pre><code>'.' is not valid as filename in directory 'C:\SVN'
  </code></pre>
  
  <p>All the actual files/folders are all greenflagged, indicating everything is up to date, the bolded line indicating my working copy revision in the log is not at the top - which is very annoying - and may happen to other developers if I don't' fix the repo.</p>
  
  <p>The folder as displayed in the repo browser is empty. When I try to delete the folder in the Tortoise repo browser I get</p>
  
  <pre><code>Unable to connect to a repository at URL
   'svn://10.151.0.107/svn_repository/source/C:'
  
  Can't open file '\svn_repository\source\C:\format': The filename, directory
   name, or volume label syntax is incorrect.
  </code></pre>
  
  <p>How can I delete this folder?</p>