【.net core】Newtonsoft.Json.DeserializeObject反序列化类对象的坑

在使用Newtonsoft.Json.DeserializeObject反序列化成Class的时候，如果类中有数组，且41行构造函数没有其他参数的情况下，数组会将初始值与新的数组直接组合后返回，引起错误！

如果随便加的参数就没有问题。。。【待源码调试，后续补坑】

using System;
using System.Collections.Generic;
using System.Linq;
using Newtonsoft.Json;
class Program
{
    static void Main(string[] args)
    {
        Student s1 = new Student();
        String ss = "{"Name":"hanzheng","courses":["m1","m2"],"courses2":["n1","n2"]}";
        Student s2 = JsonConvert.DeserializeObject<Student>(ss);
        Console.Write("123");
    }
}

public class Student
{
    private string _name; // This is the so-called "backing field"
    public string Name // This is your property
    {
        get {
            return _name;
        }
        set {
            _name = value;
        }
    }
    public List<string> courses { get; set; }
    private List<String> _courses2;
    public List<string> courses2
    {
        get {
            return _courses2;
        }
        set {
            _courses2 = value;
            _courses2.Distinct().ToList();
        }
    }

    public Student()
    {

        mak();


    }
    private void mak()
    {
        Name = "m123";
        courses = new List<string> { "h1", "h2" };
        courses2 = new List<string> { "s1", "s2" };
    }
}