title: How do I say I want one out of three FluentValidation rules to be applied?
body: <p>I have a set of phone numbers, and not everybody has one of each of these numbers. How can I specify that any of the three being satisfied is good enough:</p>
  
  <pre><code>RuleFor(p =&gt; p.PhoneHome).Matches(Regexes.TenDigitsOnly).WithMessage("Phone numbers must have only ten digits.");
  RuleFor(p =&gt; p.PhoneWork).Matches(Regexes.TenDigitsOnly).WithMessage("Phone numbers must have only ten digits.");
  RuleFor(p =&gt; p.PhoneCell).Matches(Regexes.TenDigitsOnly).WithMessage("Phone numbers must have only ten digits.");
  </code></pre>