Calculate the number of weekdays between two dates in C#

Question

How can I get the number of weekdays between two given dates without just iterating through the dates between and counting the weekdays?

Seems fairly straightforward

Answer 1

  public static List Weekdays(DateTime startDate, DateTime endDate)
  {
      if (startDate > endDate)
      {
          Swap(ref startDate, ref endDate);
      }
      List days = new List();

      var ts = endDate - startDate;
      for (int i = 0; i < ts.TotalDays; i++)
      {
          var cur = startDate.AddDays(i);
          if (cur.DayOfWeek != DayOfWeek.Saturday && cur.DayOfWeek != DayOfWeek.Sunday)
              days.Add(cur);
          //if (startingDate.AddDays(i).DayOfWeek != DayOfWeek.Saturday || startingDate.AddDays(i).DayOfWeek != DayOfWeek.Sunday)
          //yield return startingDate.AddDays(i);
      }
      return days;
  }

And swap dates

  private static void Swap(ref DateTime startDate, ref DateTime endDate)
  {
      object a = startDate;
      startDate = endDate;
      endDate = (DateTime)a;
  }