public record CreateOrderCommand(CreateOrderDto Dto, bool ValidateOnly) : ICommand<long, OrderError>, IValidatable { public IEnumerable<ValidationError>? Validate() { ICollection<ValidationResult>? results = null; if (!Validator.TryValidateObject(Dto, new ValidationContext(Dto), results, true)) { return results?.Select(r => new ValidationError(r.ErrorMessage, r.MemberNames.First())); } return null; } }