C# JSON格式及读写JSON数据

JSON（JavaScript Object Notation）是一种轻量级的数据交换格式，它易于阅读和编写，同时也易于机器解析和生成。在C#中，我们可以使用Newtonsoft.Json库来处理JSON数据。

首先，我们需要安装Newtonsoft.Json库。可以通过NuGet包管理器来安装，或者在Visual Studio中使用以下命令行来安装：

csharpInstall-Package Newtonsoft.Json

csharpusing Newtonsoft.Json;

public class Person{
 public string Name { get; set; }
 public int Age { get; set; }
}

Person person = new Person { Name = "John", Age =30 };
string json = JsonConvert.SerializeObject(person);
Console.WriteLine(json);

csharpstring json = @"{'Name':'John','Age':30}";
Person person = JsonConvert.DeserializeObject(json);
Console.WriteLine(person.Name);
Console.WriteLine(person.Age);

csharpusing System.IO;

string json = File.ReadAllText("data.json");
List people = JsonConvert.DeserializeObject>(json);
foreach (var person in people)
{
 Console.WriteLine(person.Name);
 Console.WriteLine(person.Age);
}

csharpList people = new List
{
 new Person { Name = "John", Age =30 },
 new Person { Name = "Alice", Age =25 }
};
string json = JsonConvert.SerializeObject(people);
File.WriteAllText("data.json", json);