c# 判断时间是否在 某一时间段内

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protected bool getTimeSpan(string timeStr) {     //判断当前时间是否在工作时间段内     string _strWorkingDayAM = "08:30";//工作时间上午08:30     string _strWorkingDayPM = "17:30";     TimeSpan dspWorkingDayAM = DateTime.Parse(_strWorkingDayAM).TimeOfDay;     TimeSpan dspWorkingDayPM = DateTime.Parse(_strWorkingDayPM).TimeOfDay;       //string time1 = "2017-2-17 8:10:00";     DateTime t1 = Convert.ToDateTime(timeStr);       TimeSpan dspNow = t1.TimeOfDay;     if (dspNow > dspWorkingDayAM && dspNow < dspWorkingDayPM)     {         return true;     }     return false; }