public static List<int> GetContacIDListByUserID(int userID) { SkypeDataClassesDataContext sdc = new SkypeDataClassesDataContext(); ISingleResult<SP_ContactIDList_SEL_byUserIDResult> contacts = sdc.SP_ContactIDList_SEL_byUserID(userID); List<int> idList = new List<int>(); foreach (SP_ContactIDList_SEL_byUserIDResult contact in contacts) { idList.Add(contact.ContactID); } return idList; }