Resolved Issue in Asp core 3.0 serializersettings does not exist in AddJsonOptions

Hello,

When we want to use serializersettings  function in configure service (IN startup .cs) for CamelCasing .then we get this issue  in asp core 3.0. So we can resolve it by adding below code in configure service file

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