.net - 如何确定给定月份的最后一个工作日？

Question

如何计算.NET中每月的最后一个工作日？

Answer 1

我会在周一至周五的工作周中这样做:

var holidays = new List<DateTime>{/* list of observed holidays */};
DateTime lastBusinessDay = new DateTime();
var i = DateTime.DaysInMonth(year, month);
while (i > 0)
{
  var dtCurrent = new DateTime(year, month, i);
  if(dtCurrent.DayOfWeek < DayOfWeek.Saturday && dtCurrent.DayOfWeek > DayOfWeek.Sunday && 
   !holidays.Contains(dtCurrent))
    {
      lastBusinessDay = dtCurrent;
      i = 0;
    }
    else
    {
      i = i - 1;
    }
}