public void Register(string userLogin, string userPassword, Role role)
{
User locUser = _userList.FirstOrDefault(user => user.Login == userLogin);
if (locUser != null)
{
throw new Exception("User with such login is already registered!");
}
else
{
User newUser = new User(++_lastUserId, userLogin, getMD5(userPassword), role);
_userList.PushTail(newUser);
SaveUserList();
}
}
public void AddPerson(Person person)
{
_bookPerson.PushTail(person);
}
