In a post Creating the Table Adapter Methods for GetUserByLogin, GetUserByUserName, and InsertUser, Nannette Thacker gives a good way to implement a table adapter for solving GetXXByYY in coding repeat works. Indeed, it’s very populating to implement the GetUserByName, GetUserByID, GetUserByEmail or ValidateUser and so on. So usually, you need to implement different services for UI calling, but there service basically has same implement process...