Count number of Mondays in a given date range

Question

Given a date range, I need to know how many Mondays (or Tuesdays, Wednesdays, etc) are in that range.

I am currently working in C#.

Answer 1

A bit Modified Code is here works and Tested by me

        private int CountDays(DayOfWeek day, DateTime startDate, DateTime endDate)
        {
            int dayCount = 0;

            for (DateTime dt = startDate; dt < endDate; dt = dt.AddDays(1.0))
            {
                if (dt.DayOfWeek == day)
                {
                    dayCount++;
                }
            }

            return dayCount;
        }

Example:

int Days = CountDays(DayOfWeek.Friday, Convert.ToDateTime("2019-07-04"), 
             Convert.ToDateTime("2019-07-27")).ToString();