https://stackoverflow.com/questions/66092495/jsonconvert-deserialize-object-out-of-memory-exception

CSharp · Console

/Program.cs

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.Serialization.Formatters;
using System.IO;
using System.Data;
using System.ComponentModel.DataAnnotations;
using System.Globalization;
using System.Reflection;
using System.Collections.ObjectModel;
using System.Threading.Tasks;

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

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

//https://stackoverflow.com/questions/66092495/jsonconvert-deserialize-object-out-of-memory-exception

	public class Doc
	{
		public Guid Id { get; set; }
		public byte[] Document { get; set; }
	}

	public class Program
	{
		public static async Task Test()
		{
			var inDoc = new Doc
			{
				Id = Guid.Parse("81a130d2-502f-4cf1-a376-63edeb000e9f"),
				Document = Enumerable.Range(0, short.MaxValue).Select(i => unchecked((byte)i)).ToArray(),
			};

			var inJson = Newtonsoft.Json.JsonConvert.SerializeObject(inDoc);
			Console.WriteLine(inJson);
			var inBytes = Encoding.UTF8.GetBytes(inJson);
			
			using var responseStream = new MemoryStream(inBytes);		
			
			var doc = await JsonSerializer.DeserializeAsync<Doc>(responseStream);
			
			Assert.AreEqual(inDoc.Id, doc.Id, "Id");
			
			Assert.IsTrue(inDoc.Document.SequenceEqual(doc.Document));
		}
		
		public static async Task Main(string[] args)
		{
			Console.WriteLine("Environment version: {0} ({1})", System.Runtime.InteropServices.RuntimeInformation.FrameworkDescription , GetNetCoreVersion());
			Console.WriteLine("{0} version: {1}", typeof(JsonSerializer).Assembly.GetName().Name,  typeof(JsonSerializer).Assembly.FullName);
			Console.WriteLine();

			try
			{
				await Test();
			}
			catch (Exception ex)
			{
				Console.WriteLine("Failed with unhandled exception: ");
				Console.WriteLine(ex);
				throw;
			}
		}
		
		public static string GetNetCoreVersion()
		{
			//https://techblog.dorogin.com/how-to-detect-net-core-version-in-runtime-ecd65ad695be
			//
			var assembly = typeof(System.Runtime.GCSettings).GetTypeInfo().Assembly;
			var assemblyPath = assembly.CodeBase.Split(new[] { '/', '\\' }, StringSplitOptions.RemoveEmptyEntries);
			int netCoreAppIndex = Array.IndexOf(assemblyPath, "Microsoft.NETCore.App");
			if (netCoreAppIndex > 0 && netCoreAppIndex < assemblyPath.Length - 2)
				return assemblyPath[netCoreAppIndex + 1];
			return null;
		}
	}