class Person
{
    public Person() { }

    public string Name;
    public int Age;
    public string Sex;
    public string Address;
    
    public void PrintInfo(object obj, Person person)
    {
        if(obj is TextBox textBox)
        {
            textBox.Text = person.ToString();
        }
    }

    public override string ToString()
    {
        StringBuilder sb = new StringBuilder();
        sb.AppendLine($"Name : {this.Name}");
        sb.AppendLine($"Age : {this.Age}");
        sb.AppendLine($"Sex : {this.Sex}");
        sb.AppendLine($"Address : {this.Address}");

        return sb.ToString();
    }
}

private void button_serialize_Click(object sender, EventArgs e)
{
    Person person = new Person();
    person.Name = "홍길동";
    person.Age = 23;
    person.Sex = "남자";
    person.Address = "경기도 광주시";

    string json = JsonConvert.SerializeObject(person);
    textBox1.Text = json;
}

private void button_deserialize_Click(object sender, EventArgs e)
{
    Person newPerson = JsonConvert.DeserializeObject<Person>(textBox1.Text);
    newPerson.PrintInfo(textBox2, newPerson);
}

class Village
{
    public Village() { }

    public string Location;
    public Fruit[] Fruit;

    public void PrintInfo(object obj, Village village)
    {
        if (obj is TextBox textBox)
        {
            textBox.Text = village.ToString();
        }
    }

    public override string ToString()
    {
        StringBuilder sb = new StringBuilder();
        sb.AppendLine($"Location : {this.Location}");

        foreach(Fruit fruits in Fruit)
        {
            sb.AppendLine($"Fruit.Name : {fruits.Name}");
            sb.AppendLine($"Fruit.Kcal : {fruits.Kcal}");
            sb.AppendLine($"Fruit.Price : {fruits.Price}");
        }            

        return sb.ToString();
    }
}

class Fruit
{
    public Fruit(string name, int kcal, int price)
    {
        Name = name;
        Kcal = kcal;
        Price = price;
    }

    public string Name;
    public int Kcal;
    public int Price;
}

private void button_serializeArr_Click(object sender, EventArgs e)
{
    Village village = new Village();
    village.Location = "Korea";
    village.Fruit = new[] { new Fruit("Apple", 52, 1200),
                            new Fruit("Banana", 88, 800),
                            new Fruit("Strawberry", 32, 500)};

    string json = JsonConvert.SerializeObject(village);
    textBox1.Text = json;
}

private void button_deserializeArr_Click(object sender, EventArgs e)
{
    Village newVillage = JsonConvert.DeserializeObject<Village>(textBox1.Text);
    newVillage.PrintInfo(textBox2, newVillage);
} 

class Village
{
    public Village() { }

    public string Location;
    public Fruit[] Fruit;
    [JsonIgnore()] //해당 필드는 포함하지 않음!
    public int Count;
    ...
}