<PackageReference Include="System.Text.Json" Version="10.0.0-preview.7.25380.108" />

System.Text.Json.Serialization.JsonNumberHandlingAttribute

When placed on a type, property, or field, indicates what JsonNumberHandling settings should be used when serializing or deserializing numbers.
namespace System.Text.Json.Serialization { public sealed class JsonNumberHandlingAttribute : JsonAttribute { public JsonNumberHandling Handling { get; } public JsonNumberHandlingAttribute(JsonNumberHandling handling); } }