using System;

using System.Text.Json;

using System.Text.Json.Serialization;

using System.Collections.Generic;

​

// This class specifies the absolute bare minimum fields the API cares about

// All additional fiels are just simply ignored when deserializing

// By adding the additional "ExtensionData" and accompanying attribute, the excess fields are preserved

// and included when re-serialized to JSON

public class BaseConfiguration

{

    public string TenantID { get; set; } = string.Empty;

    public string SisType { get; set; } = string.Empty;

​

    [JsonExtensionData]

    public Dictionary<string, JsonElement>? ExtensionData { get; set; }

​

    public BaseConfiguration()

    {

    }

​

    public override string ToString() => $"{{\"tenantId\": \"{TenantID}\", \"sisType\":\"{SisType}\"}}";

}

​

public class Program

{

    const string jsonInput = """

    {

        "tenantId": "abcdefg",

        "sisType": "Aeries",

        "baseUrl": "https://example.com/",

        "maxConnectionsPerSecond": 100,

        "createByUser": "User",

        "createdDatetime": "1900-01-01 00:00:00.0000",

        "pageSize": 5000

    }

    """;

    public static void Main()

    {

        JsonSerializerOptions deserializationOptions = new JsonSerializerOptions()

        {

            PropertyNameCaseInsensitive = true

        };

        BaseConfiguration? deserialized = JsonSerializer.Deserialize<BaseConfiguration>(jsonInput, deserializationOptions);

        Console.WriteLine(deserialized.ToString() + "\n");

        JsonSerializerOptions serializationOptions = new JsonSerializerOptions()

        {

            PropertyNamingPolicy = JsonNamingPolicy.CamelCase,

            WriteIndented = true

        };

        Console.WriteLine("reserialized:");

        Console.WriteLine(JsonSerializer.Serialize(deserialized, serializationOptions));

    }

}