title: Renaming a directory in C#
body: <p>I couldn't find a DirectoryInfo.Rename(To) or FileInfo.Rename(To) method anywhere.  So, I wrote my own and I'm posting it here for anybody to use if they need it, because let's face it : the MoveTo methods are overkill and will always require extra logic if you just want to rename a directory or file :</p>
  
  <pre><code>public static class DirectoryExtensions
  {
      public static void RenameTo(this DirectoryInfo di, string name)
      {
          if (di == null)
          {
              throw new ArgumentNullException("di", "Directory info to rename cannot be null");
          }
  
          if (string.IsNullOrWhiteSpace(name))
          {
              throw new ArgumentException("New name cannot be null or blank", "name");
          }
  
          di.MoveTo(Path.Combine(di.Parent.FullName, name));
  
          return; //done
      }
  }
  </code></pre>