No service for type 'System.String' has been registered.
using System.Text.Json;
var text = Console.ReadLine();
var jsonDocument = JsonDocument.Parse(text);
var elements = from obj in jsonDocument.RootElement.EnumerateArray()
let mark = obj.GetProperty("markName").GetString()
let serie = obj.GetProperty("serieName").GetString()
let name = $"{mark} {serie}"
select name;
var result = string.Join(", ", elements);
Console.WriteLine(result);var max = 359999;
var ts = TimeSpan.FromSeconds(max);
var hours = (int)ts.TotalHours;
var minutes = ts.Minutes;
var seconds = ts.Seconds;
var formattedString = $"{hours}:{minutes}:{seconds}";
Console.WriteLine(formattedString); // 99:59:59