Calculate the number of business days between two dates?

Question

In C#, how can I calculate the number of business (or weekdays) days between two dates?

Answer 1

Here is an approach if you are using MVC. I have also calculated national holidays or any festive days to be excluded by fetching it from holidayscalendar which you will need to make one.

        foreach (DateTime day in EachDay(model))
        {
            bool key = false;
            foreach (LeaveModel ln in holidaycalendar)
            {
                if (day.Date == ln.Date && day.DayOfWeek != DayOfWeek.Saturday && day.DayOfWeek != DayOfWeek.Sunday)
                {
                    key = true; break;
                }
            }
            if (day.DayOfWeek == DayOfWeek.Saturday || day.DayOfWeek == DayOfWeek.Sunday)
            {
                key = true;
            }
            if (key != true)
            {
                leavecount++;
            }
        }

Leavemodel is a list here