You work as a Web Developer at Certkiller.com. You are in the process of creating a Webapplication using Microsoft ASP.NET 3.5. 
You create a folder named Dark in the App_Themes folder of the Web application. You also addfour skin files to this folder. You have to make sure that the controls on a page have their
appearances overridden by the control definitions defined in the skin files. What should you do？ 
Which Page directive should you use？（）

You work as a Web Developer at Certkiller.com. You are in the process of creating a mobile Webapplication. You use Microsoft ASP.NET 3.5 to create the Web application. 
In an assembly named MobileUser the following code exists： 
namespace Certkiller.MobileUser { 
public class Capabilities { 
public static bool IsEnhancedDevice（MobileCapabilities capabilities， string optional） { 
return （capabilities["AJAX"] == Boolean.TrueString && 
capabilities["Silverlight"] == Boolean.TrueString）； 
} 
} 
} 
The following code is contained on a page in the Web application： 
MobileCapabilities capabilities = （MobileCapabilities）Request.Browser； 
bool isEnhancedDevice = capabilities.HasCapability（"SilverlightAndAjax"， null） 
You have to make sure that the code calls the IsEnhancedDevice method of the Capabilities class.You configure the Web.config file to accomplish this.
What should you do？（）