C# JSON简单测试

using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Text.Json.Serialization;

namespace TestJSON
{
    internal class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("读取 data.json");
            string jsonString = File.ReadAllText("data.json");
            List<Item> myList = JsonConvert.DeserializeObject<List<Item>>(jsonString);
            if (myList == null)
            {
                myList = new List<Item>();
            }
            string input = "0";
            int inputInt = 0;
            string inputString = "";
            while (input != "q")
            {
                Console.WriteLine("按'a'加项");
                Console.WriteLine("按'd'加项");
                Console.WriteLine("按's'加项");
                Console.WriteLine("按'q'加项");
                Console.WriteLine("按空格：");
                input = Console.ReadLine().ToLower();
                switch (input)
                {
                    case "a":
                        Console.WriteLine("新加一项");
                        Console.WriteLine("输入要增加名字：");
                        inputString = Console.ReadLine();
                        Console.WriteLine("请输入价格");
                        inputInt = Convert.ToInt32(Console.ReadLine());
                        myList.Add(new Item(inputString, inputInt));
                        Console.WriteLine("新增加"+inputString+"价格"+inputInt);
                        break;
                    case "d":
                        Console.WriteLine("删除一项");
                        Console.WriteLine("输入要删除名字：");
                        inputString = Console.ReadLine();
                        myList.Remove(new Item(inputString));
                        break;
                    case "s":
                        Console.WriteLine("\n 显示每项");
                        foreach (var item in myList)
                        {
                            Console.WriteLine("Item:"+item.Name+"|$"+item.Price);
                        }
                        Console.WriteLine("\n");
                        break;
                    case "q":
                        Console.WriteLine("退出");
                        break;
                    default:
                        Console.WriteLine("重新测试"); 
                        break;
                }
            }
            Console.WriteLine("开始写入 data.Json");
            string data= JsonConvert.SerializeObject(myList);
            File.WriteAllText("data.json",data);
            Console.WriteLine("写入完成");
        }
    }
}

using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Text;

namespace TestJSON
{
    public class Item : IEquatable<Item>
    {
        public string Name;
        public int Price;

        public Item(string name, int price =0)
        {
            this.Name = name;
            this.Price = price;
        }
        public bool Equals(Item other)
        {
            if (other == null) return false;
            return Name.Equals(other.Name);

        }
    }
}

[{"Name":"ham","Price":1000000},{"Name":"huotuo","Price":20},{"Name":"xiao","Price":1},{"Name":"binggan","Price":12}]