多项选择题
A.Add the following attribute to the AddressType field. [XmlAttribute]
B.Add the following attribute to the Line2 field. [XmlElement（IsNullable=true）]
C.Add the following attribute to the ZipPostalCode field. [XmlAttribute（"ZipCode"）]
D.Add the following attribute to the ZipPostalCode field. [XmlElement（"ZipCode"）]
多项选择题 You are implementing an ASP.NET Web site. The Web site contains a Web service named CustomerService. The code-behind file for the CustomerService class contains the following code segment. You need to ensure that the GetProducts method can be called by using AJAX.Which two actions should you perform？（）
单项选择题 You are implementing an ASP.NET application. You add the following code segment. You need to add code to return a list of all Person objects except those with a UserId that is contained in the secretUsers list. The resulting list must not contain duplicates. Which code segment should you use？（）
单项选择题 You are implementing an ASP.NET application that uses LINQ to Entities to access and update the database.The application includes the following method to update a detached entity of type Person. You need to implement the UpdatePerson method to update the database row that corresponds to the personToEdit object. Which code segment should you use？（）
