namespace System.Text.Json.Serialization.Converters { internal sealed class ObjectConverter : JsonConverter<object> { public ObjectConverter() { IsInternalConverterForNumberType = true; } public override object Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) { if (options.UnknownTypeHandling == JsonUnknownTypeHandling.JsonElement) return JsonElement.ParseValue(ref reader); return JsonNodeConverter.Instance.Read(ref reader, typeToConvert, options); } public override void Write(Utf8JsonWriter writer, object value, JsonSerializerOptions options) { writer.WriteStartObject(); writer.WriteEndObject(); } internal override object ReadAsPropertyNameCore(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) { ThrowHelper.ThrowNotSupportedException_DictionaryKeyTypeNotSupported(TypeToConvert, this); return null; } internal override void WriteAsPropertyNameCore(Utf8JsonWriter writer, object value, JsonSerializerOptions options, bool isWritingExtensionDataProperty) { Type type = value.GetType(); JsonConverter converterInternal = options.GetConverterInternal(type); if (converterInternal == this) ThrowHelper.ThrowNotSupportedException_DictionaryKeyTypeNotSupported(type, this); converterInternal.WriteAsPropertyNameCoreAsObject(writer, value, options, isWritingExtensionDataProperty); } internal override object ReadNumberWithCustomHandling(ref Utf8JsonReader reader, JsonNumberHandling handling, JsonSerializerOptions options) { if (options.UnknownTypeHandling == JsonUnknownTypeHandling.JsonElement) return JsonElement.ParseValue(ref reader); return JsonNodeConverter.Instance.Read(ref reader, typeof(object), options); } } }