public IEnumerable <ValidationResult> Validate(ValidationContext validationContext)
{
// Sql injection validation on text strings. just matching to keywords in sql to block unwanted injections.
if (Country.Contains("Delete") || Country.Contains("Alter") || Name.Contains("Delete") || Name.Contains("Alter") || Adress.Contains("Delete") || Adress.Contains("Alter"))
{
yield return(new ValidationResult(
$"Any sql keywords are banned.",
new[] { nameof(Country) }));
}
}