title: HRESULT E_FAIL when trying to create a folder that's name contains a colon in WinRT
body: <p>Having a StorageFolder object and trying to create a folder with a name that contains a colon somewhere inside (not at the beginning or the end) results in a COM error with HRESULT 80004005 (HRESULT E_FAIL).</p>
  
  <p>Example:
      await ApplicationData.Current.TemporaryFolder.CreateFolderAsync("abc:xyz", 
         CreationCollisionOption.OpenIfExists);</p>
  
  <p>If the colon is at the beginning ot at the end I get a HRESULT 8007007b with the message "The filename, directory name, or volume label syntax is incorrect". That's fine. </p>
  
  <p>I checked with other invalid chars but only a colon leads to E_FAIL.</p>
  
  <p>This may be a problem if the user enters the folder name. Workaround is of course to simply check for a colon in the filename.</p>
  
  <p>Does anyone know a possible reason for the E_FAIL error? I assume that COM thinks the foldername starts with an URI but can of course not figure out what kind of URI it is.</p>