/// <summary> /// Checks if country code is valid or not. /// </summary> /// <returns></returns> public override void Validate(ModelStateDictionary modelState) { if (string.IsNullOrEmpty(Model)) { return; } var country = codeService.GetCountryByCode(Model); if (string.IsNullOrEmpty(country)) { modelState.AddModelError(PropertyName, string.Format(CoreMessages.OpenApi.CodeNotFound, Model)); } }