//(базовый класс контроллера)
using...
namespace MyApi.Controllers
{
    [Authorize]
    [Produces("application/json")]
    [Route("api/[controller]")]
    [ResponseCache(Location = ResponseCacheLocation.None, NoStore = true)]
    [ApiController]
    public abstract class MyApiControllerBase : ControllerBase, IMyApiControllerBase
    {
        [NonAction]
        public virtual BadRequestObjectResult BadRequestDetails(string title)
        {
            return HttpContext.BadRequestDetails(new ProblemDetails { Title = title });
        }

        [NonAction]
        public virtual BadRequestObjectResult BadRequestDetails(ProblemDetails details)
        {
            return HttpContext.BadRequestDetails(details);
        }
    }
}

//IMyApiControllerBase
using Microsoft.AspNetCore.Mvc;
namespace MyApi.Controllers
{
    public interface MyIApiControllerBase
    {
        BadRequestObjectResult BadRequestDetails(string title);
    }
}

public interface IMyApiControllerBase