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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？（）

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？（）