The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters.
ublic void ProcessFolderForHtml(string sourcePath,…...style='font-size:14px; font-style:italic;'>Generated on: {DateTime.Now:ddd MMM...WriteLine("HTML file tree generated at: " + htmlOutputPath); }...