Write an application that declares two Book objects and uses an extension method named DisplayTitleAndAuthor() with each. Th e method displays a Book’s title, the word “by”, and the author’s name....

Write an application that declares two Book objects and uses an extension method named DisplayTitleAndAuthor() with each. Th e method displays a Book’s title, the word “by”, and the author’s name. Save the program as BookDemo3.cs.