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

    int numday = 0;
    int dayofweek = 5; //friday
    DateTime thirdfriday;
    for (int i = 0; i < (date.AddMonths(1) - date).Days && numday <3; i++)
    {
        if ((int)date.AddDays(i).DayOfWeek == dayofweek)
        {
            numday++;
        }
        if (numday == 3)
        {
            thirdfriday = date.AddDays(i);
        }

    }