public void AddGuest(User newUser)
{
if (newUser == null)
{
throw new ArgumentNullException();
}
if (UserNameAlreadyExists(newUser.UserName))
{
throw new UserAlreadyExistsException();
}
if (!(MailAddressIsValid(newUser.MailAddress)))
{
throw new NotValidEmailAddressException();
}
Guest guest = new Guest()
{
UserName = newUser.UserName,
Password = newUser.Password,
PrivateName = newUser.PrivateName,
FamilyName = newUser.FamilyName,
Type = newUser.Type,
MailAddress = newUser.MailAddress,
RegistrationDate = DateTime.Today
};
myDal.AddGuest(guest);
}