如何在linq中查询嵌套的json数据？

using Newtonsoft.Json.Linq;

// 解析JSON数据为JObject对象
string json = "{\"name\":\"John\",\"age\":30,\"pets\":[{\"name\":\"Cat\",\"age\":5},{\"name\":\"Dog\",\"age\":3}]}";
JObject obj = JObject.Parse(json);

// 使用LINQ查询语法查询嵌套的JSON数据
var query = from pet in obj["pets"]
            where (int)pet["age"] > 4
            select pet;

// 遍历查询结果
foreach (var pet in query)
{
    Console.WriteLine("Name: " + pet["name"]);
    Console.WriteLine("Age: " + pet["age"]);
}

// 使用方法链查询嵌套的JSON数据
var query2 = obj["pets"]
    .Where(pet => (int)pet["age"] > 4)
    .Select(pet => new
    {
        Name = (string)pet["name"],
        Age = (int)pet["age"]
    });

// 遍历查询结果
foreach (var pet in query2)
{
    Console.WriteLine("Name: " + pet.Name);
    Console.WriteLine("Age: " + pet.Age);
}