public override bool Equals(System.Object otherBook)
{
if (!(otherBook is Book))
{
return(false);
}
else
{
Book newBook = (Book)otherBook;
bool idEquality = this.GetId() == newBook.GetId();
bool titleEquality = this.GetTitle() == newBook.GetTitle();
bool copiesEquality = this.GetCopies() == newBook.GetCopies();
return(idEquality && titleEquality && copiesEquality);
}
}