How to find the 3rd Friday in a month with C#?

Question

Given a date (of type DateTime), how do I find the 3rd Friday in the month of that date?

Answer 1

Sorry to jump in late on this... Might help someone else tho.

Begin rant: Loops, yuck. Too much code, yuck. Not Generic Enough, yuck.

Here's a simple function with a free overload.

public DateTime DateOfWeekOfMonth(int year, int month, DayOfWeek dayOfWeek, byte weekNumber)
{
    DateTime tempDate = new DateTime(year, month, 1);
    tempDate = tempDate.AddDays(-(tempDate.DayOfWeek - dayOfWeek));

    return
        tempDate.Day > (byte)DayOfWeek.Saturday
            ? tempDate.AddDays(7 * weekNumber)
            : tempDate.AddDays(7 * (weekNumber - 1));
}

public DateTime DateOfWeekOfMonth(DateTime sender, DayOfWeek dayOfWeek, byte weekNumber)
{
    return DateOfWeekOfMonth(sender.Year, sender.Month, dayOfWeek, weekNumber);
}

Your usage:

DateTime thirdFridayOfMonth = DateOfWeekOfMonth(DateTime.Now, DayOfWeek.Friday, 3);