public static Author CheckDuplicate(Author checkAuthor)
{
List <Author> allAuthors = Author.GetAll();
bool isInDB = false;
foreach (Author author in allAuthors)
{
if (author.GetFirstName() == checkAuthor.GetFirstName() && author.GetLastName() == checkAuthor.GetLastName())
{
isInDB = true;
checkAuthor.SetId(author.GetId());
}
}
if (!isInDB)
{
checkAuthor.Save();
}
return(checkAuthor);
}