你写一个图书管理系统系统，这个系统在vs中用c#语言写后端代码，在vsCode中用vue写前端代码

好的，下面是一个简单的图书管理系统的后端代码示例，使用C#语言编写，可以在Visual Studio中运行：

using System;
using System.Collections.Generic;

namespace BookManagementSystem
{
    class Program
    {
        static List<Book> bookList = new List<Book>();

        static void Main(string[] args)
        {
            Console.WriteLine("Welcome to the Book Management System!");

            while (true)
            {
                Console.WriteLine("1. Add a book");
                Console.WriteLine("2. Search for a book");
                Console.WriteLine("3. View all books");
                Console.WriteLine("4. Exit");

                int choice = int.Parse(Console.ReadLine());

                switch (choice)
                {
                    case 1:
                        AddBook();
                        break;
                    case 2:
                        SearchBook();
                        break;
                    case 3:
                        ViewAllBooks();
                        break;
                    case 4:
                        Environment.Exit(0);
                        break;
                    default:
                        Console.WriteLine("Invalid choice!");
                        break;
                }
            }
        }

        static void AddBook()
        {
            Console.WriteLine("Enter book title:");
            string title = Console.ReadLine();

            Console.WriteLine("Enter author name:");
            string author = Console.ReadLine();

            Console.WriteLine("Enter publication year:");
            int year = int.Parse(Console.ReadLine());

            Book book = new Book(title, author, year);
            bookList.Add(book);

            Console.WriteLine("Book added successfully!");
        }

        static void SearchBook()
        {
            Console.WriteLine("Enter book title:");
            string title = Console.ReadLine();

            foreach (Book book in bookList)
            {
                if (book.Title.Equals(title, StringComparison.OrdinalIgnoreCase))
                {
                    Console.WriteLine("Book found:");
                    Console.WriteLine(book);
                    return;
                }
            }

            Console.WriteLine("Book not found!");
        }

        static void ViewAllBooks()
        {
            foreach (Book book in bookList)
            {
                Console.WriteLine(book);
            }
        }
    }

    class Book
    {
        public string Title { get; set; }
        public string Author { get; set; }
        public int Year { get; set; }

        public Book(string title, string author, int year)
        {
            Title = title;
            Author = author;
            Year = year;
        }

        public override string ToString()
        {
            return Title + " by " + Author + " (" + Year + ")";
        }
    }
}

下面是一个简单的图书管理系统的前端代码示例，使用Vue.js编写，可以在VS Code中运行：

<template>
  <div>
    <h1>Book Management System</h1>
    <form @submit.prevent="addBook">
      <label for="title">Title:</label>
      <input type="text" id="title" v-model="newBook.title" required>
      <br>
      <label for="author">Author:</label>
      <input type="text" id="author" v-model="newBook.author" required>
      <br>
      <label for="year">Publication Year:</label>
      <input type="number" id="year" v-model.number="newBook.year" required>
      <br>
      <button>Add Book</button>
    </form>
    <hr>
    <h2>Search for a Book</h2>
    <form @submit.prevent="searchBook">
      <label for="searchTitle">Title:</label>
      <input type="text" id="searchTitle" v-model="searchTitle" required>
      <br>
      <button>Search</button>
    </form>
    <hr>
    <h2>All Books</h2>
    <ul>
      <li v-for="book in bookList">{{ book.title }} by {{ book.author }} ({{ book.year }})</li>
    </ul>
  </div>
</template>

<script>
export default {
  data() {
    return {
      newBook: {
        title: "",
        author: "",
        year: 0
      },
      searchTitle: "",
      bookList: []
    };
  },
  methods: {
    addBook() {
      this.bookList.push({
        title: this.newBook.title,
        author: this.newBook.author,
        year: this.newBook.year
      });
      this.newBook.title = "";
      this.newBook.author = "";
      this.newBook.year = 0;
    },
    searchBook() {
      for (let i = 0; i < this.bookList.length; i++) {
        if (this.bookList[i].title.toLowerCase() === this.searchTitle.toLowerCase()) {
          alert(this.bookList[i].title + " by " + this.bookList[i].author + " (" + this.bookList[i].year + ")");
          return;
        }
      }
      alert("Book not found!");
    }
  }
};
</script>