sady_wydzialy_repertoria.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Net.Http;
using System.Net.Http.Json;
using System.Text.Encodings.Web;
using System.Text.Json;
using System.Text.Json.Serialization;
using System.Text.Unicode;

const string apiPrefix = "https://portal.wroclaw.sa.gov.pl/api/slps/";


var client = new HttpClient()
{
    BaseAddress = new Uri(apiPrefix)
};


var courts = await client.GetFromJsonAsync<List<Court>>("courts");

foreach (var court in courts)
{
    Console.WriteLine(court.Name);
    var departments = await client.GetFromJsonAsync<List<Department>>($"courts/{court.Id}/departments");
    court.Departments = departments;
    foreach (var department in departments)
    {
        Console.WriteLine("  "+department.Name);
        var repertories = await client.GetFromJsonAsync<List<String>>($"courts/{court.Id}/departments/{department.Id}/repertories");
        department.Repertories = repertories;
        Console.WriteLine("    " + String.Join(", ", repertories));
    }
}

File.WriteAllText("out.txt", JsonSerializer.Serialize(courts, options: new JsonSerializerOptions()
    {WriteIndented = true,Encoder = JavaScriptEncoder.Create(UnicodeRanges.BasicLatin, UnicodeRanges.LatinExtendedA)}));



public class Court
{
    [JsonPropertyName("name")]
    public string Name { set; get; }

    [JsonPropertyName("zrskId")]
    public int Id { set; get; }

    [JsonPropertyName("departments")]
    public List<Department> Departments { set; get; }



}

public class Department
{
    [JsonPropertyName("name")]
    public string Name { set; get; }

    [JsonPropertyName("zrskId")]
    public int Id { set; get; }

    [JsonPropertyName("number")]
    public string Number { set; get; }

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