Can I serialize a JsonObject using AOT-compatible methods?

[fabianoriccardi]

As reported in the title, can I serialize a JsonObject (edited dynamically) and being compatible with AOT?
I don't care to assign the JSON into a class, since I just need to attach a key-value pair in the root of a json object, disregarding its actual content. Example:

JsonObject obj = new();
obj.Add("key1", "value1");
string str = JsonSerializer.Serialize(obj);

But the third line gives the following 2 warnings:

Using member 'System.Text.Json.JsonSerializer.Serialize<TValue>(TValue, JsonSerializerOptions)' which has 'RequiresUnreferencedCodeAttribute' can break functionality when trimming application code. JSON serialization and deserialization might require types that cannot be statically analyzed. Use the overload that takes a JsonTypeInfo or JsonSerializerContext, or make sure all of the required types are preserved.
Using member 'System.Text.Json.JsonSerializer.Serialize<TValue>(TValue, JsonSerializerOptions)' which has 'RequiresDynamicCodeAttribute' can break functionality when AOT compiling. JSON serialization and deserialization might require types that cannot be statically analyzed and might need runtime code generation. Use System.Text.Json source generation for native AOT applications.

I'm using .NET9.

[neon-sunset]

JsonNode, which JsonObject inherits from, has dedicated serialization/parsing methods which do not go through generic reflection-based path:

• https://learn.microsoft.com/en-us/dotnet/api/system.text.json.nodes.jsonnode.tojsonstring
• https://learn.microsoft.com/en-us/dotnet/api/system.text.json.nodes.jsonnode.parse

e.g. dotnet publish /p:PublishAot=true emits no warnings for

using System.Text.Json.Nodes;

var forecastObject = new JsonObject
{
    ["Date"] = new DateTime(2019, 8, 1),
    ["Temperature"] = 25,
    ["Summary"] = "Hot",
    ["DatesAvailable"] = new JsonArray(
            new DateTime(2019, 8, 1), new DateTime(2019, 8, 2)),
    ["TemperatureRanges"] = new JsonObject
    {
        ["Cold"] = new JsonObject
        {
            ["High"] = 20,
            ["Low"] = -10
        }
    },
    ["SummaryWords"] = new JsonArray("Cool", "Windy", "Humid")
};

Console.WriteLine(forecastObject.ToJsonString());

[fabianoriccardi]

Thanks, this is exactly what I was looking for!