using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Globalization;
using System.Text.RegularExpressions;

namespace ExtractDates
{
    class ExtractDates
    {
        static void Main(string[] args)
        {
            string format = "dd.MM.yyyy";

            string text = "some text and some date line 10.01.2015 and some more. text and 05.03.2051"
               + "some more mails line 22.12.2012 kraq na sveta 2k.12.2012";

            foreach (var extracted in Regex.Matches(text, @"\d{2}.\d{2}.\d{4}"))
            {

                string extractedToString = Convert.ToString(extracted);

                DateTime date = DateTime.ParseExact(extractedToString, format, CultureInfo.InvariantCulture);

                Console.WriteLine(date.ToString(CultureInfo.GetCultureInfo("en-CA")));
            }



        }
    }
}