public override IEnumerable <ValidationState> Validate(string propertyName)
{
if (propertyName == nameof(FullName))
{
var errors = NotEqual("Reed Copsey").Validate(FullName, "This is a poor choice of names.");
yield return(ValidationState.NewPropertyErrors(nameof(FullName), errors));
yield return(ValidationState.NewEntityErrors(errors));
}
}
