如何选择Newtonsoft动态类型属性值？

{
  "name": "John Doe",
  "age": 30,
  "isStudent": false,
  "courses": ["Math", "Science"]
}

using Newtonsoft.Json;
using System;

class Program
{
    static void Main()
    {
        string json = @"{
            ""name"": ""John Doe"",
            ""age"": 30,
            ""isStudent"": false,
            ""courses"": [""Math"", ""Science""]}";

        dynamic obj = JsonConvert.DeserializeObject(json);

        string name = obj.name;
        Console.WriteLine(name); // 输出: John Doe
    }
}

if (obj.hasOwnProperty("name"))
{
    string name = obj.name;
    Console.WriteLine(name);
}
else
{
    Console.WriteLine("Name property does not exist.");
}

var nameMember = obj.TryGetMember(new NameValueCollection { { "name", "" } }, out var nameValue);
if (nameMember)
{
    Console.WriteLine(nameValue.Value);
}
else
{
    Console.WriteLine("Name property does not exist.");
}