ValidatorErrors

 if (!this.IsValidModel(model))
            {
                var resultErrors = new StringBuilder();
                var errors = this.ParameterValidator.ModelErrors;
                foreach (var error in errors)
                {
                    resultErrors.AppendLine($"<p>{string.Join(" ", error.Value)}</p>");
                }
                this.Model.Data["error"] = resultErrors.ToString();
                return this.View();
            }