Wolfman | 狼人游戏 by React | Frontend Framework library

Book book1 = new Book("Fight club");          // <-- book1 holds a ref to 'Fight Club'
ChangeBookName(book1, "The Wolfman");         // <-- a copy of that ref is passed as an argument
// ...                                        // <-- book1 still holds the original ref to 'Fight Club'
    
void ChangeBookName(Book book, string name){  // <-- receives the copy of the ref to 'Fight Club'
    book = new Book(name);                    // <-- overwrites it with a ref to 'The Wolfman'
}                                             // <-- lifetime of the temp copy ends here
                                              // <-- 'The Wolfman` object becomes eligible for gc