计算工作中请假时间，不计算周六周日

代码如下

public int CountTime(DateTime FromDate, DateTime ToDate)
        {
TimeSpan ts = FromDate.Subtract(ToDate).Duration();
                Days+= Convert.ToInt32(ts.Days.ToString())-1;
                int FromWeek = GetWeek(Convert.ToDateTime(FromDateTime).DayOfWeek.ToString());
                int ToWeek = GetWeek(Convert.ToDateTime(ToDateTime).DayOfWeek.ToString());
                if (ts.Days + FromWeek > 5)
                {
                    Days -= (ts.Days + FromWeek) / 7 * 2;
                    if ((ts.Days + FromWeek) % 7 == 6)
                    {
                        Days -= 1;
                    }
                }
return Days;
}
/// <summary>
        /// 根据星期英文返回数字星期几
        /// </summary>
        /// <param name="dt"></param>
        /// <returns></returns>
        protected int GetWeek(string dt)
        {
            int week=0;
            
            switch (dt)
            {
                case "Monday":
                    week = 1;
                    break;
                case "Tuesday":
                    week = 2;
                    break;
                case "Wednesday":
                    week = 3;
                    break;
                case "Thursday":
                    week = 4;
                    break;
                case "Friday":
                    week = 5;
                    break;
                case "Saturday":
                    week = 6;
                    break;
                case "Sunday":
                    week = 7;
                    break;
            }
            return week;
        }