.net core : incomplete JSON response

Question

I\'m trying to build simple API for training, in my database I got users (firstname, lastname, email password, list) and sports ( name, userID). A

Answer 1

In my case this solve my issue on core 3, by using Newtonsoft: https://docs.microsoft.com/en-us/aspnet/core/web-api/advanced/formatting?view=aspnetcore-3.0#add-newtonsoftjson-based-json-format-support

Prior to ASP.NET Core 3.0, the default used JSON formatters implemented using the Newtonsoft.Json package. In ASP.NET Core 3.0 or later, the default JSON formatters are based on System.Text.Json. Support for Newtonsoft.Json based formatters and features is available by installing the Microsoft.AspNetCore.Mvc.NewtonsoftJson NuGet package and configuring it in Startup.ConfigureServices.

    public void ConfigureServices(IServiceCollection services)
{
    services.AddControllers()
        .AddNewtonsoftJson();
}