书后不是有二维码，你拿微信扫一下就可以下载相关资料了。里面因该有源码

class Book
{
    public static int Id { get; set; }
    public static string Name { get; set; }
    public static double Price { get; set; }

    public static void SetBook(int id, string name, double price)
    {
        Id = id;
        Name = name;
        Price = price;
    }
    public static void PrintMsg()
    {
        Console.WriteLine("图书编号：" + Id);
        Console.WriteLine("图书名称：" + Name);
        Console.WriteLine("图书价格：" + Price);
    }
}