System.Text.Json – Deserialize nested object as string

Found a right way how to correctly read the nested JSON object inside the JsonConverter. The complete solution is the following:

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

    public string Name { get; set; }

    [JsonConverter(typeof(InfoToStringConverter))]
    public string Info { get; set; }
}

public class InfoToStringConverter : JsonConverter<string>
{
    public override string Read(
        ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
    {
        using (var jsonDoc = JsonDocument.ParseValue(ref reader))
        {
            return jsonDoc.RootElement.GetRawText();
        }
    }

    public override void Write(
        Utf8JsonWriter writer, string value, JsonSerializerOptions options)
    {
        throw new NotImplementedException();
    }
}

In the code itself there is no need even to create options:

var json = @"{
                 ""Id"": 1,
                 ""Name"": ""Some Name"",
                 ""Info"": {
                     ""Additional"": ""Fields"",
                     ""Are"": ""Inside""
                 }
             }";

var model = JsonSerializer.Deserialize<SomeModel>(json);

The raw JSON text in the Info property contains even extra spaces introduced in the example for nice readability.

And there is no mixing of model representation and its serialization as remarked @PavelAnikhouski in his answer.