protected function FormatTags($Tags) {
      // Don't bother if there aren't any tags
      if (!$Tags)
         return '';
      
      // Get the array
      $TagsArray = Gdn_Format::Unserialize($Tags);     
      
      // Compensate for deprecated space-separated format 
      if (is_string($TagsArray) && $TagsArray == $Tags)
         $TagsArray = explode(' ', $Tags);
      
      // Safe format
      $TagsArray = Gdn_Format::Text($TagsArray);
      
      // Send back an comma-separated string
      return implode(',', $TagsArray);
   }