public IEnumerable <ValidationResult> Validate(ValidationContext validationContext)
 {
     if (CustomRepository.CheckConsigneeExistsOrNot(Gstnumber, PanNumber, PhoneNumber, ConsigneeId))
     {
         var fieldName = new[] { "Name" };
         yield return(new ValidationResult("Consignee is Already Exists.", fieldName));
     }
 }