using System.Collections;
using System.Collections.Generic;
using System.Runtime.Serialization.Formatters;
using System.ComponentModel.DataAnnotations;
using System.Globalization;
using System.Collections.ObjectModel;
using System.Text.Json.Serialization;
public int id { get; set; }
public static void Test()
var obj = new My.Shared.DataObject { id = 8642 };
var input = new List<My.Shared.DataObject> { obj, obj };
var options = new JsonSerializerOptions
ReferenceHandler = ReferenceHandler.Preserve,
var json = JsonSerializer.Serialize(input, options);
var output = JsonSerializer.Deserialize<My.Shared.DataObject []>(json, options);
Console.WriteLine("Exception trying to deserialize as a My.Shared.DataObject []:");
Console.WriteLine(ex.Message);
var list = JsonSerializer.Deserialize<List<My.Shared.DataObject>>(json, options);
Console.WriteLine("Succeeded in deserialize a List<My.Shared.DataObject>. Result:");
Assert.AreEqual(list[0], list[1]);
public static void Main()
Console.WriteLine("Environment version: {0} ({1})", System.Runtime.InteropServices.RuntimeInformation.FrameworkDescription , GetNetCoreVersion());
Console.WriteLine("System.Text.Json version: " + typeof(JsonSerializer).Assembly.FullName);
Console.WriteLine("Failed with unhandled exception: ");
public static string GetNetCoreVersion()
var assembly = typeof(System.Runtime.GCSettings).GetTypeInfo().Assembly;
var assemblyPath = assembly.Location.Split(new[] { '/', '\\' }, StringSplitOptions.RemoveEmptyEntries);
int netCoreAppIndex = Array.IndexOf(assemblyPath, "Microsoft.NETCore.App");
if (netCoreAppIndex > 0 && netCoreAppIndex < assemblyPath.Length - 2)
return assemblyPath[netCoreAppIndex + 1];