// Exception handling in action method
try
{
    // ...
}
catch(HttpStatusException ex)
{
    return StatusCode(ex.StatusCode, ex.Message, ex.GetDetails());
}
catch(Exception ex)
{
    // ...
}

throw new HttpStatusException(HttpStatusCode.BadRequest, new SomeDetails
{
    Id = "err111",
    Message = "AAA 속성의 값이 정수가 아닙니다.",
});

// Exception handling in action method 
try
{
    // ...
}
catch(SomethingWrongException ex)
{
    return StatusCode(HttpStatusCode.Forbidden, ex.Message, ex.GetDetails());
}
catch(Exception ex)
{
    // ...
}

throw new SomethingWrongException("데이터를 처리하지 못했습니다.", new SomeDetails 
{
    Id = "err111",
    Message = "AAA 속성의 값이 정수가 아닙니다.",
});

// Configure() on Startup.cs
app.UseSwaggerUIWithApiVersioning();

var sample = getSampleModel();
sample.ToJson();

var defaultOptions = new JsonSerializerOptions
{
    WriteIndented = true,
    Encoder = JavaScriptEncoder.UnsafeRelaxedJsonEscaping,
    PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
};

// ConfigureService() on Startup.cs
var defaultApiVersion = new ApiVersion(1, 0);
services.Configure<AppOptions>(Configuration.GetSection(AppOptions.Name));

services.AddApiVersioningAndSwaggerGen(defaultApiVersion);

[ApiExceptionHandlerFilter]
// ...
public class SomeController : ApiControllerBase 
{
    // ...
}

[HttpGet]
[ApiExceptionHandlerFilter]
public IActionResult SomeAction()
{
    // ...
}

// ConfigureService() on Startup.cs
services.AddControllers(options => 
{
    options.Filters.Add<ApiExceptionHandlerFilter>();
});

var error = new ErrorModel
{
    Code = "Some code",
    Message = "Some message",
    InnerError = new ErrorModel
    {
        Code = "Some inner code",
        Message = "Some inner message",
    }
});

[ApiVersion(DefaultValues.ApiVersion)]
[ApiController]
[Area(DefaultValues.AreaName)]
[Route(DefaultValues.RouteTemplate)]
[ApiExceptionHandlerFilter]
public class WeatherForecastController : ApiControllerBase 
{
    // ...
}

var responseData = GetResponseData();

return StatusCode(HttpStatusCode.OK, responseData)

// ConfigureService() on Startup.cs
services.Configure<AppOptions>(Configuration.GetSection(AppOptions.Name));

public class MyConfigureSwaggerOptions :  ConfigureSwaggerOptionsBase {
    public MyConfigureSwaggerOptions(IApiVersionDescriptionProvider provider, IOptionsMonitor<AppOptions> optionsAccessor)
        : base(provider) 
    {
        options = optionsAccessor.CurrentValue;
    }

    public override string AppTitle => options.Title;

    public override string AppDescription => options.Description;

    private readonly AppOptions options;
}