DoubleConverter sealed class DoubleConverter : JsonConverter<double> Documentation Code namespace System.Text.Json.Serialization.Converters { internal sealed class DoubleConverter : JsonConverter<double> { public override double Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) { return reader.GetDouble(); } public override void Write(Utf8JsonWriter writer, double value, JsonSerializerOptions options) { writer.WriteNumberValue(value); } } }