多项选择题 You are creating a composite control for capturing user address information in a Web application. You define a number of properties that the user can set at design time. You need to group these properties in the Properties dialog box. In addition, you need to ensure that when users click on a particular property, they receive a short explanation of that property. The properties are shown in the exhibit. Which two actions should you perform?（）

多项选择题 You create a server control that inherits from WebControl. You need to enable the server control to emit markup for a new kind of mobile device. You must not alter the code in the server controls. Which two actions should you perform?（）

单项选择题 You create a Web Form that allows users to create a new account. You add a CreateUserWizard control by using the following code segment.You need to ensure that the wizard automatically sends an e-mail message to users when they finish creating their accounts. You add a valid element to the Web.config file. Which code segment should you add to the Page_Load event?（）