/** Test if aBook is contained in this BookList.
* Return true if book is equal to a Book in the list,
* false otherwise. */
public bool Contains(Book book)
{ // code for extra credit
foreach (Book aBook in list)
{
if (aBook.GetTitle() == book.GetTitle() && aBook.GetAuthor() == book.GetAuthor() && aBook.Getyear() == book.Getyear())
{
return(true);
}
}
return(false);
}
