[Fork] https://stackoverflow.com/questions/60123376/jsonserializer-deserialize-fails

CSharp · Console

/Program.cs

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.Text.Json;
using System.Text.Json.Serialization;

using NUnit.Framework; // Throws NUnit.Framework.AssertionException

//https://stackoverflow.com/questions/60123376/jsonserializer-deserialize-fails

	public class User {
		public int Id { get; set; }
	}

    class TestClass
    {
        public static void Test()
        {
			int id = 9;
			string str = "{\"id\": " + id + "}";
			Console.WriteLine(str);
			var options = new JsonSerializerOptions { PropertyNameCaseInsensitive = true };
			var u = JsonSerializer.Deserialize<User>(str, options);
			Console.WriteLine($"User ID: {u.Id}, Correct: {id == u.Id}");  // always 0/init/default value
			Assert.IsTrue(u.Id == id);
		}	
	}

	public class Program
	{
		public static void Main()
		{
			Console.WriteLine("Environment version: {0} ({1}), {2}, {3}", 
							  System.Runtime.InteropServices.RuntimeInformation.FrameworkDescription, Environment.Version, Environment.OSVersion, 
							  System.Runtime.InteropServices.RuntimeInformation.OSDescription);
			Console.WriteLine();

			try
			{
				TestClass.Test();
			}
			catch (Exception ex)
			{
				Console.WriteLine("Failed with unhandled exception: ");
				Console.WriteLine(ex);
				throw;
			}
		}
	}