public void Validate()
{
RequestValidator.RequiredField("zip code", _zipCode);
RequestValidator.Match("zip code", _zipCode, @"^\d{5}(?:[-\s]\d{4})?$");
}
public void Validate()
{
RequestValidator.RequiredField("zip code", _zipCode);
RequestValidator.Match("zip code", _zipCode, @"^\d{5}(?:[-\s]\d{4})?$");
}