Week days between two dates

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public static int  WeekCount(DateTime startDate, DateTime endDate, DayOfWeek Week)
{

    // Number of days between start date and end date

int _noOfDays = (endDate - startDate).Days;      

   // days between week of start date
    int _adjustingDays = (7 + (int)Week - (int)startDate.DayOfWeek) % 7; 

// days remain after total days after dividing 7
    int _remainDays = _noOfDays % 7;

    int _totalWeekTurns = (_noOfDays) / 7;
    int _addTurns = _remainDays >= _remainDays ? 1 : 0;
 
    return _totalWeekTurns + _addTurns;
}