ByteArrayConverter sealed class ByteArrayConverter : JsonConverter<byte[]> Documentation Code using System.Text.Json.Schema; namespace System.Text.Json.Serialization.Converters { internal sealed class ByteArrayConverter : JsonConverter<byte[]> { public override byte[] Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) { if (reader.TokenType == JsonTokenType.Null) return null; return reader.GetBytesFromBase64(); } public override void Write(Utf8JsonWriter writer, byte[] value, JsonSerializerOptions options) { if (value == null) writer.WriteNullValue(); else writer.WriteBase64StringValue(value); } internal override JsonSchema GetSchema(JsonNumberHandling _) { return new JsonSchema { Type = JsonSchemaType.String }; } } }