private void searchByDate(Tag tag, String pic)
    {
        if (tag.ToString().Contains("Date/Time Original"))
        {
            var regex = new Regex(@"bd{4}:d{2}:d{2}b");
            Match m = regex.Match(tag.ToString());
            DateTime dateFound;
            DateTime.TryParseExact(m.ToString(), "yyyy:MM:dd", CultureInfo.InvariantCulture, DateTimeStyles.None, out dateFound);

            Console.WriteLine(dateFound);

            if (checkEnd && dateFound != null) if (dateFound >= date && dateFound <= dateEnd) Console.WriteLine("Date found between"); //foundPictures.Add(pic);
            else if (dateFound != null) Console.WriteLine("single date found");//foundPictures.Add(pic);
            else Console.WriteLine("No dates found");
        }
    }

16.09.2017 00:00:00
Date found between
16.09.2017 00:00:00
Date found between
07.12.2016 00:00:00
Date found between

16.09.2017 00:00:00
16.09.2017 00:00:00
07.12.2016 00:00:00

16.09.2017 00:00:00
16.09.2017 00:00:00
07.12.2016 00:00:00