/// <summary>
/// Caculates the number of weekdays between two dates
/// </summary>
public static int WeekdaysBetweenTwoDates(DateTime firstDate, DateTime secondDate)
{
//Compare supplied dates
if (ValidateInputDates(firstDate, secondDate))
{
return(0);
}
//Get the date range between the two dates excluding firstDate and secondDate
var dateRange = DayCounterHelper.GetDateRangeBetweenTwoDates(firstDate, secondDate);
//Count the number of dates that are a weekday "Monday, Tuesday, Wednesday, Thursday, Friday"
var weekdayCount = DayCounterHelper.GetWeekdays(dateRange).Count();
//Return the count
return(weekdayCount);
}