delete empty folders in a directory

I am trying to delete all of the empty directories in a directory. I have code that works:

        private static void processDirectory(string startLocation)
        {
            foreach (var directory in Directory.GetDirectories(startLocation))
            {
                processDirectory(directory);
                if (Directory.GetFiles(directory).Length == 0 && Directory.GetDirectories(directory).Length == 0)
                {
                    Directory.Delete(directory, false);
                    log.Rows.Add(DateTime.Now, "Success", "The directory named " + directory + " was deleted because it was empty.");
                }
            }
        }

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which works good other than the line about adding the row to the log will not work because it is out of the context.

I tried putting this block of code into the main part of the code, but it will not work.

ideas?

Thanks.