using System;
public class Program
{
public static void Main()
}
public class book
private int id;
private string name;
private string author;
private double price;
public book(int id, string name, string author, double price)
this.id=id;
this.name=name;
this.author=author;
this.price=price;
public int Getid()
return this.id;
public string Getname()
return this.name;
public string Getauthor()
return this.author;
public double Getprice()
return this.price;
