Find the week of the year

gistfile1.cs

using System;
using System.Globalization;

namespace WeekNumberCalculator
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.Title = "Find the Week of the Year";
            int weekNumber = CultureInfo.CurrentCulture.Calendar.GetWeekOfYear(DateTime.Parse("2012-09-10 16:09:00"), CalendarWeekRule.FirstFullWeek,
                                                          DayOfWeek.Monday);
            Console.WriteLine(string.Format("The week number is {0}, but you don't believe it ;-)", weekNumber));
            Console.ReadLine();
        }
    }
}