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You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. You create a custom control named OrderForm. You write the following code segment：  
public delegate void CheckOrderFormEventHandler（EventArgs e）； private static readonly object CheckOrderFormKey = new object（）；  
public event CheckOrderFormEventHandler CheckOrderForm  
{  
add { Events.AddHandler（CheckOrderFormKey， value）； } 
remove { Events.RemoveHandler（CheckOrderFormKey， value）； } 
}   
You need to provide a method that enables the OrderForm control to raise the CheckOrderForm event. 
Which code segment should you use？（）

You are the senior technician at Certkiller.com. You have been instructed to create a MicrosoftASP.NET application using Microsoft .NET Framework v3.5. 
You make use of ASP.NET AJAX to create a web form. In order to handle exception from
asynchronous postbacks you decide to write the client script code fragment below. You write thefollowing client-script code fragment to handle the exceptions thrown from asynchronouspostbacks. （The line numbers is included for reference purposes）
01 <script type="text/javascript">
02 function pageLoad（）
03 {
04  var pageMgr = Sys.WebForms.PageRequestManager.getInstance（）；
05
06 }
07
08 function errorHandler（sender， args）
09 {
10
11 }
12 </script> 
You receive an instruction from the network administrator to ensure that the application is able toexecute the criteria below：
* You need to ensure that the application makes use of a common client-script function namederrorHandler.
* The Label control with an ID named TestError should be updated with the error message.* The browser should not display any message box or Javascript error 
How can this be accomplished？（）