public XorSpecification(Specification <T> left, Specification <T> right)
{
_right = right;
_left = left;
}
public IEnumerable <T> Retrieve(Specification <T> specification)
{
// TODO: reconsider backing store -- this type casting is a slow operation
return(BackingStore.Select(x => Convert.ChangeType(x.Value, x.Type)).OfType <T>().Where(specification));
}
