using System;

using System.Globalization;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        string s = "20.09.2015 10.16.12";

        DateTime d;

        bool isValid = DateTime.TryParseExact(s, "dd.MM.yyyy HH.mm.ss", CultureInfo.InvariantCulture, DateTimeStyles.None, out d);

        Console.WriteLine(isValid.ToString());

        Console.WriteLine(d.ToString());

    }

}