In this second part, we have designed a typical module in nearly creating any Silverlight based line-of-business applications. In other word, we have discussed the typical master-detail operations and the related items using the popular ADO.NET Data Services technology. In handling such kind of business, we should take a serious and earnest attitude towards the possible relations between the entity objects; observe as far as possible the logical rules in existence rather than violate them. In the subsequent third part we will continue to explore another important part of the system-- the image file upload and download module.