System.IO.DirectoryInfo.CreateSubdirectory C# (CSharp) Method

        public DirectoryInfo CreateSubdirectory(String path)
        {
            if (path == null)
                throw new ArgumentNullException(nameof(path));
            Contract.EndContractBlock();

            return CreateSubdirectoryHelper(path);
        }

        /// <summary>
        /// Archives the exception report.
        /// The name of the PDF file is modified to make it easier to identify.
        /// </summary>
        /// <param name="pdfFile">The PDF file.</param>
        /// <param name="archiveDirectory">The archive directory.</param>
        public static void ArchiveException(FileInfo pdfFile, string archiveDirectory)
        {
            // Create a new subdirectory in the archive directory
            // This is based on the date of the report being archived
            DirectoryInfo di = new DirectoryInfo(archiveDirectory);
            string archiveFileName = pdfFile.Name;
            string newSubFolder = ParseFolderName(archiveFileName);
            try
            {
                di.CreateSubdirectory(newSubFolder);
            }
            catch (Exception ex)
            {
                // The folder already exists so don't create it
            }

            // Create destination path
            // Insert _EXCEPT into file name
            // This will make it easier to identify as an exception in the archive folder
            string destFileName = archiveFileName.Insert(archiveFileName.IndexOf("."), "_EXCEPT");
            string destFullPath = archiveDirectory + "\\" + newSubFolder + "\\" + destFileName;

            // Move the file to the archive directory
            try
            {
                pdfFile.MoveTo(destFullPath);
            }
            catch (Exception ex)
            {
            }
        }