public enum OperationStatus
{
    /// <summary>
    /// Indicates that the status has not been set.
    /// </summary>
    Undefined = 0,

    /// <summary>
    /// The operation was successful.
    /// </summary>
    Success,

    /// <summary>
    /// The requested resource does not exist.
    /// </summary>
    NotFound,

    /// <summary>
    /// The operation is not allowed.
    /// </summary>
    NotAllowed,

    /// <summary>
    /// The operation is not supported at the moment.
    /// </summary>
    NotSupported,

    /// <summary>
    /// The operation is not valid (for example it contains an inconsistent data).
    /// </summary>
    NotValid,

    /// <summary>
    /// An internal error has occured.
    /// </summary>
    InternalError
}

public class ObjectResult : ActionResult, IStatusCodeActionResult, IActionResult
  {
    private MediaTypeCollection _contentTypes;

    public ObjectResult(object value)
    {
      this.Value = value;
      this.Formatters = new FormatterCollection<IOutputFormatter>();
      this._contentTypes = new MediaTypeCollection();
    }

    [ActionResultObjectValue]
    public object Value { get; set; }

    public FormatterCollection<IOutputFormatter> Formatters { get; set; }

    public MediaTypeCollection ContentTypes
    {
      get
      {
        return this._contentTypes;
      }
      set
      {
        MediaTypeCollection mediaTypeCollection = value;
        if (mediaTypeCollection == null)
          throw new ArgumentNullException(nameof (value));
        this._contentTypes = mediaTypeCollection;
      }
    }

    public Type DeclaredType { get; set; }

    /// <summary>Gets or sets the HTTP status code.</summary>
    public int? StatusCode { get; set; }

    public override Task ExecuteResultAsync(ActionContext context)
    {
      return context.HttpContext.RequestServices.GetRequiredService<IActionResultExecutor<ObjectResult>>().ExecuteAsync(context, this);
    }

    /// <summary>
    /// This method is called before the formatter writes to the output stream.
    /// </summary>
    public virtual void OnFormatting(ActionContext context)
    {
      if (context == null)
        throw new ArgumentNullException(nameof (context));
      if (!this.StatusCode.HasValue)
        return;
      context.HttpContext.Response.StatusCode = this.StatusCode.Value;
      if (!(this.Value is ProblemDetails problemDetails) || problemDetails.Status.HasValue)
        return;
      problemDetails.Status = new int?(this.StatusCode.Value);
    }
  }