System.Net.FtpClient.FtpListItem.ParseDosList C# (CSharp) Method

        static FtpListItem ParseDosList(string buf, FtpCapability capabilities)
        {
            FtpListItem item = new FtpListItem();
            string[] datefmt = new string[] {
                "MM-dd-yy  hh:mmtt",
                "MM-dd-yyyy  hh:mmtt"
            };
            Match m;

            // directory
            if ((m = Regex.Match(buf, @"(?<modify>\d+-\d+-\d+\s+\d+:\d+\w+)\s+<DIR>\s+(?<name>.*)$", RegexOptions.IgnoreCase)).Success) {
                DateTime modify;

                item.Type = FtpFileSystemObjectType.Directory;
                item.Name = m.Groups["name"].Value;

                //if (DateTime.TryParse(m.Groups["modify"].Value, CultureInfo.InvariantCulture, DateTimeStyles.AssumeUniversal, out modify))
                if (DateTime.TryParseExact(m.Groups["modify"].Value, datefmt, CultureInfo.InvariantCulture, DateTimeStyles.AssumeUniversal, out modify))
                    item.Modified = modify;
            }
            // file
            else if ((m = Regex.Match(buf, @"(?<modify>\d+-\d+-\d+\s+\d+:\d+\w+)\s+(?<size>\d+)\s+(?<name>.*)$", RegexOptions.IgnoreCase)).Success) {
                DateTime modify;
                long size;

                item.Type = FtpFileSystemObjectType.File;
                item.Name = m.Groups["name"].Value;

                if (long.TryParse(m.Groups["size"].Value, out size))
                    item.Size = size;

                //if (DateTime.TryParse(m.Groups["modify"].Value, CultureInfo.InvariantCulture, DateTimeStyles.AssumeUniversal, out modify))
                if (DateTime.TryParseExact(m.Groups["modify"].Value, datefmt, CultureInfo.InvariantCulture, DateTimeStyles.AssumeUniversal, out modify))
                    item.Modified = modify;
            }
            else
                return null;

            return item;
        }