Renaming a directory in C#

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 :

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
    }
}