Hi. Which method declare in policy and which one in DomainServices, what is difference between this two concept?
Actually, IPolicy interface is not documented yet. So, you can ignore it. If you want to know more, you can search on the web for "domain driven design policy pattern". For example: <a class="postlink" href="http://stackoverflow.com/questions/14185139/difference-between-specification-and-a-policy">http://stackoverflow.com/questions/1418 ... d-a-policy</a> describes it well.