How to turn off or handle camelCasing in JSON response ASP.NET Core?

In Asp.Net Core 3.0 some things have changed. For camelCase do nothing that is out of the box. For PascalCase or another set style use.

services.AddMvc(setupAction=> {            setupAction.EnableEndpointRouting = false;        }).AddJsonOptions(jsonOptions =>        {            jsonOptions.JsonSerializerOptions.PropertyNamingPolicy = null;        })        .SetCompatibilityVersion(CompatibilityVersion.Version_3_0);

In Startup.cs ConfigureServices section

For those who needs a solution about a PascalCase within Api Project that has not the Mvc services you should add this after AddControllers services

 // This method gets called by the runtime. Use this method to add services to the container.        public void ConfigureServices(IServiceCollection services)        {            services.AddControllers().AddJsonOptions(jsonOptions =>                {                    jsonOptions.JsonSerializerOptions.PropertyNamingPolicy = null;                } ;        }

For Asp.Net Core 3.1 using the NewtonSoft.Json

services.AddControllers()        .AddNewtonsoftJson(options =>        {            options.UseMemberCasing();        });