public static DateTime NextWorkingTime(DateTime start, bool isStart)
{
if (start.TimeOfDay >= TimeSpan.FromHours(isStart ? 17 : 17.01))
{
start = start.Date.AddHours(24 + 8);
}
else if (start.Hour < 8)
{
start = start.Date.AddHours(8);
}
while (start.DayOfWeek == DayOfWeek.Saturday || start.DayOfWeek == DayOfWeek.Sunday)
{
start = start.AddDays(1);
}
return(start);
}