单项选择题 You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. All the content pages in the application use a single master page. The master page uses a static navigation menu to browse the site.  You need to ensure that the content pages can optionally replace the static navigation menu with their own menu controls.  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. The application has a mobile Web form that contains the following ObjectList control：   <mobile：ObjectList ID="ObjectListCtrl"  OnItemCommand="ObjectListCtrl_ItemCommand" Runat="server">   <Command Name="CmdDisplayDetails" Text="Details" />   <Command Name="CmdRemove" Text="Remove" />   </mobile：ObjectList>    You create an event handler named ObjectListCtrl_ItemCommand.  You need to ensure that the ObjectListCtrl_ItemCommand handler detects the selection of the CmdDisplayDetails item.  Which code segment should you write？（）

单项选择题 You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. The application contains the following code segment：   public class CapabilityEvaluator  {  public static bool ChkScreenSize（System.Web.Mobile.MobileCapabilities cap， String arg） { int screenSize = cap.ScreenCharactersWidth * cap.ScreenCharactersHeight；   return screenSize < int.Parse（arg）；   }  }    You add the following device filter element to the Web.config file：   <filter name="FltrScreenSize"    type="MyWebApp.CapabilityEvaluator，MyWebApp"    method="ChkScreenSize" />    You need to write a code segment to verify whether the size of the device display is less than 80 characters.  Which code segment should you use？（）