You can change the JSON behavior in ASP.NET Core by configuring [JsonOptions](https://docs.microsoft.com/en-us/dotnet/api/microsoft.aspnetcore.mvc.jsonoptions) or
[MvcNewtonsoftJsonOptions](https://learn.microsoft.com/en-us/dotnet/api/microsoft.aspnetcore.mvc.mvcnewtonsoftjsonoptions)(if you use `Newtonsoft.Json`)
Configuring JSON options in ABP does not affect ASP.NET Core's JSON settings. To modify ASP.NET Core JSON behavior, configure [JsonOptions](https://docs.microsoft.com/en-us/dotnet/api/microsoft.aspnetcore.mvc.jsonoptions) or [MvcNewtonsoftJsonOptions](https://learn.microsoft.com/en-us/dotnet/api/microsoft.aspnetcore.mvc.mvcnewtonsoftjsonoptions) (if you're using `Newtonsoft.Json`) separately.