文章标题

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Demo
{

/// <summary>/// 图书类/// </summary>class Book{    public Book ()    {    }    public Book(int BarCode, string BookName)    {        this.BarCode = BarCode;        this.BookName = BookName;    }    public Book (int BarCode, string BookName,string Author)        :this (BarCode,BookName)//括号内参数    {        //this.BarCode = BarCode;        //this.BookName = BookName;        this.Author = Author;    }    /// <summary>    /// 图书的条码    /// </summary>    public int BarCode { get; set; }    /// <summary>    /// 图书名称    /// </summary>    public string BookName { get; set; }    /// <summary>    /// 图书作者    /// </summary>    public string Author { get; set; }    /// <summary>    /// 发行时间    /// </summary>    public DateTime PublicDate { get; set; }     /// <summary>    /// 图书价格    /// </summary>    public double UnitPrice { get; set; }    /// <summary>    /// 根据条件查询图书信息    /// </summary>    /// <param name="BarCode">图书条码</param>    /// <param name="BookName">图书名称</param>    /// <returns>返回图书对象</returns>    public string GetBooks(string BarCode,string BookName)    {        return string.Format("图书条码:{0} 图书名称:{1}", BarCode, BookName);    }    public void ShowBook()    {        string info = string.Format("图书条码:{0} 图书名称:{1}", BarCode, BookName);        Console.WriteLine(info);    }}

}