public void Add_Nanny(Nanny nanny1)
{
int age = (DateTime.Now.Subtract(nanny1.Birth_Date).Days);//we make minus between now and birth date and take all the days that she lives
if (age / 365 < 18)
{
throw new Exception("cant add nanny less then 18 years");
}
for (int i = 0; i < 7; i++)//check end isnt smaller then begining
{
if (nanny1.Work_Hours[1, i] < nanny1.Work_Hours[0, i])
{
throw new Exception("wrong hours format");
}
}
my_dal.Add_Nanny(nanny1);
}