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You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. You plan to add a custom parameter in the SqlDataSource control. You write the following code fragment：  
<asp：SqlDataSource ID="SqlDataSource1" runat="server"  
InsertCommand="INSERT INTO [Employee] （[Field1]， [Field2]， [PostedDate]）   
VALUES （@Field1， @Field2， @PostedDate）"> 
<InsertParameters>  
<asp：Parameter Name="Field1" />  
<asp：Parameter Name="Field2" />  
<custom：DayParameter Name="PostedDate" /> 
</InsertParameters>  
</asp：SqlDataSource>   
You write the following code segment to create a custom parameter class：  
public class DayParameter ： Parameter { }
You need to ensure that the custom parameter returns the current date and time. Which code segment should you add to the DayParameter class？ （）

You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. You create a Microsoft Windows Communication Foundation （WCF） service that exposes the following service contract：  
01 [ServiceContract]  
02 public interface IBlogService  
03 {  
04   [OperationContract]  
05   [WebGet（ResponseFormat=WebMessageFormat.Xml）]  
06   Rss20FeedFormatter GetBlog（）；  
07 }
You configure the WCF service to use the WebHttpBinding class， and to be exposed at the following URL：  
http：//www.contoso.com/BlogService   
You need to store the result of the GetBlog operation in an XmlDocument variable named xmlBlog in a Web form. 
Which code segment should you use？（）