public IEnumerable <Employee> Filter(IEnumerable <Employee> items, ICriteria <Employee> criteria)
{
foreach (var i in items)
{
if (criteria.IsAccepted(i))
{
yield return(i);
}
}
}
public bool IsAccepted(T t)
{
return(first.IsAccepted(t) && second.IsAccepted(t));
}