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 Web user control named SharedControl. The control will be compiled as a library.  You write the following code segment for the SharedControl control： 01 protected override void OnInit（EventArgs e）   02 {   03   base.OnInit（e）；   04   05 }    All the master pages in the ASP.NET application contain the following directive. <%@ Master Language="C#" EnableViewState="false" %>    You need to ensure that the state of the SharedControl control can persist on the pages that reference a master page.  Which code segment should you insert at line 04？（）

单项选择题 You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. You create a Web page named Default.aspx in the root of the application. You add an ImageResources.resx resource file in the App_GlobalResources folder. The ImageResources.resx file contains a localized resource named LogoImageUrl. You need to retrieve the value of LogoImageUrl.  Which code segment should you use？（）

单项选择题 You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. The application allows users to post comments to a page that can be viewed by other users. You add a SqlDataSource control named SqlDS. You write the following code segment：   01 private void SaveComment（）   02 {   03   string ipaddr；   04   05   SqlDS1.InsertParameters["IPAddress"].DefaultValue = ipaddr；   06   ...  07   SqlDS1.Insert（）；   08 }   You need to ensure that the IP Address of each user who posts a comment is captured alongwith the user’s comment.  Which code segment should you insert at line 04？（）