单项选择题 You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. The application consumes an ASMX Web service. The Web service is hosted at the following URL： http：//www.contoso.com/TemperatureService/Convert.asmx    You need to ensure that the client computers can communicate with the service as part of the <system.serviceModel> configuration.  Which code fragment should you use？（）

单项选择题 You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. You write the following code fragment：   01 <asp：RequiredFieldValidator   02   ID="rfValidator1" runat="server"   03   Display="Dynamic" ControlToValidate="TextBox1"   04   05 >   06   07 </asp：RequiredFieldValidator>   08   09 <asp：ValidationSummary DisplayMode="List"   10   ID="ValidationSummary1" runat="server" />   You need to ensure that the error message displayed in the validation control is also displayed in the ValidationSummary list.  What should you do？（）

单项选择题 You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. You create a custom-templated server control.  You need to ensure that the child controls of the server control are uniquely identified within the control hierarchy of the page.  Which interface should you implement？（）