[Fork] https://stackoverflow.com/questions/66495660/net-5-0-signature-change-of-system-text-json-jsonserializer-deserialize

CSharp · Console

/Program.cs

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

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

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

//https://stackoverflow.com/questions/64201481/what-is-the-difference-if-any-between-the-jsonrequired-and-jsonpropertyreq

	public class Thing {
		public int Id { get; set; }
		public string Name { get; set; }
		[JsonConverter(typeof(UnsafeRawJsonConverter))]
		public string Data { get; set; } // JSON Data
	}

    /// <summary>
    /// Serializes the contents of a string value as raw JSON.  The string is validated as being an RFC 8259-compliant JSON payload
    /// </summary>
	public class RawJsonConverter : JsonConverter<string>
	{
        public override string Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
		{
			using var doc = JsonDocument.ParseValue(ref reader);
			return doc.RootElement.GetRawText();
		}

		protected virtual bool SkipInputValidation => false;

        public override void Write(Utf8JsonWriter writer, string value, JsonSerializerOptions options) =>
			// skipInputValidation : true will improve performance, but only do this if you are certain the value represents well-formed JSON!
			writer.WriteRawValue(value, skipInputValidation : SkipInputValidation);
	}
	
    /// <summary>
    /// Serializes the contents of a string value as raw JSON.  The string is NOT validated as being an RFC 8259-compliant JSON payload
    /// </summary>
	public class UnsafeRawJsonConverter : RawJsonConverter
	{
		protected override bool SkipInputValidation => true;
	}

    class TestClass
    {
        public static void Test()
        {
			Test("{\"key\":\"value\"}");
			Test(@"[
[[""aa"",2,[],{}]]]");
			Test("true");
			Test(null);
			Assert.Throws<JsonException>(()=> Test("Foo"));
		}
		
        public static void Test(string data)
        {
			var thing = new Thing
			{
				Id = 1,
				Name = "Thing",
				Data = data,
			};
			
			var json = JsonSerializer.Serialize(thing, new JsonSerializerOptions { WriteIndented = true });
			
			Console.WriteLine(json);
			
			var thing2 = JsonSerializer.Deserialize<Thing>(json);
			
			Console.WriteLine(thing2.Data);
			
			Assert.AreEqual(data, thing2.Data);
		}
	}

	public class Program
	{
		public static void Main()
		{
			Console.WriteLine("Environment version: {0} ({1})", System.Runtime.InteropServices.RuntimeInformation.FrameworkDescription, Environment.Version);
			Console.WriteLine("System.Text.Json version: " + typeof(JsonSerializer).Assembly.FullName);
			Console.WriteLine();

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