Date.DayOfYear C# (CSharp) Method

    public int DayOfYear()
    {
        return daysCumulative[Month-1] + Day + (Month > 2 && IsLeapYear(Year) ? 1 : 0);
    }

    static void Main()
    {
        Date dateMoonWalk = new Date();

        Console.WriteLine("Moon walk: {0}, Day of Year: {1}",
                          dateMoonWalk, dateMoonWalk.DayOfYear());
    }