public override void Validate(VerifierResultCollection validationErrors)
{
if (Addresses.Count == 0)
validationErrors.Add(new VerifierResult(false, "StaffingResource must have at least one address",
"Addresses"));
if (PhoneNumbers.Count == 0)
validationErrors.Add(new VerifierResult(false, "StaffingResource must have at least one phone number",
"PhoneNumbers"));
}