I want to render a ProblemDetails (Microsoft.AspNetCore.Mvc) response body from a NoContent() response.

{
“type”: “string”,
“title”: “string”,
“status”: 0,
“detail”: “string”,
“instance”: “string”
}

According to docs, ProblemDetails, ProblemDetails will not automatically render from any status code less than 400.

I have played around with modifying Program.cs with builder.services.AddProblemDetails, ProblemDetailsFactory, etc. (see documentation link above)

No matter what I do, I’ve not had luck with 204.

Has anyone done this successfully, can it be done? Any pointers in the right direction?

namespace Company.Controllers
{
    [ApiController]
    [Route("[controller]")]
    public class ImportantController : BaseController
    {
        [HttpGet]
        [ValidateModelState]
        [Route("/api/important")]
        [Produces("application/json")]
        [ProducesResponseType(typeof(IEnumerable<ImportantDataResponse>), 200)]
        [ProducesResponseType(typeof(ProblemDetails), StatusCodes.Status204NoContent)]
        [ProducesResponseType(typeof(ProblemDetails), StatusCodes.Status400BadRequest)]
        public async Task<IActionResult> GetImportantData([FromQuery][Required] string dashboardId)
        {
        ...
           try
            {
            IEnumerable<ImportantDataModel> objResult = await _circuitBreakerPolicy.ExecuteAsync(() => _service.GetImportantData(dashboardId));

        if (objResult.Count() > 0)
        {
                   return Ok(objResult);
        } else 
        {
           return NoContent();
        }
            }
            catch (Exception ex) { 
                throw;
            }
            return BadRequest();
        }