public Book(ISBN exactISBN, string exactAuthor, string exactName, string exactPublishingHouse,
DateTime exactPublishmentYear, int exactPagesNumber, decimal exactPrice)
{
isbn = exactISBN;
author = exactAuthor;
name = exactName;
publishingHouse = exactPublishingHouse;
publishmentYear = exactPublishmentYear;
pagesNumber = exactPagesNumber;
price = exactPrice;
}
public override bool Equals(object obj)
{
if (obj == null)
{
return(false);
}
if (obj.GetType() != GetType())
{
return(false);
}
ISBN isbn = (ISBN)obj;
return(Equals(isbn));
}
public int CompareTo(object o)
{
Book book = o as Book;
return(ISBN.CompareTo(book.ISBN));
}
public bool Equals(ISBN isbn)
{
return(CountryCode == isbn.CountryCode && PublishingHouseCode == isbn.PublishingHouseCode &&
NumberOfBook == isbn.NumberOfBook && ControlNumber == isbn.ControlNumber);
}