public static bool Equals(Textbook obj, Textbook obj2)
{
bool same = false;
if (obj.myISBN() == obj2.myISBN())
{
same = true;
}
return(same);
}
static void Main(string[] args)
{
Textbook book1 = new Textbook();
Textbook book2 = new Textbook();
Textbook book3 = new Textbook();
Equals(book1, book2);
Equals(book1, book3);
Books[] myBooks = new Books[100];
int r = 1;
while (r < 100)
{
Console.WriteLine(myBooks[r]);
r++;
}
}