JSON 转 C# 实体类

using System.Collections.Generic;
using System.Text.Json.Serialization;

public class Root
{
    [JsonPropertyName("id")]
    public int Id { get; set; }

    [JsonPropertyName("user_name")]
    public string UserName { get; set; }

    [JsonPropertyName("active")]
    public bool Active { get; set; }

    [JsonPropertyName("balance")]
    public double Balance { get; set; }

    [JsonPropertyName("roles")]
    public List<string> Roles { get; set; }

    [JsonPropertyName("profile")]
    public Profile Profile { get; set; }

    [JsonPropertyName("orders")]
    public List<Order> Orders { get; set; }
}

public class Profile
{
    [JsonPropertyName("nick_name")]
    public string NickName { get; set; }

    [JsonPropertyName("age")]
    public int Age { get; set; }
}

public class Order
{
    [JsonPropertyName("order_no")]
    public string OrderNo { get; set; }

    [JsonPropertyName("amount")]
    public int Amount { get; set; }
}