public int CompareTo(object obj)
{
ClassBook it = obj as ClassBook;
if (this.year == it.year)
{
return(0);
}
else if (this.year > it.year)
{
return(1);
}
else
{
return(-1);
}
}
static void Main(string[] args)
{
ClassBook book1 = new ClassBook();
book1.SetBook("author1", "title1", 100, 1990);
ClassBook book2 = new ClassBook();
book2.SetBook("author2", "title2", 150, 1999);
ClassBook book3 = new ClassBook();
book3.SetBook("author3", "title3", 190, 2009);
ClassBook book4 = new ClassBook();
book4.SetBook("author4", "title4", 179, 1970);
ClassBook book5 = new ClassBook();
book5.SetBook("author5", "title5", 130, 1950);
ClassBook[] bookArray = new ClassBook[5] {
book1, book2, book3, book4, book5
};
Console.WriteLine($"Before sorting:");
foreach (ClassBook book in bookArray)
{
book.Show();
}
Array.Sort(bookArray);
Console.WriteLine($"After sorting:");
foreach (ClassBook book in bookArray)
{
book.Show();
}
Console.ReadLine();
}