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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 control named OrderForm.  You write the following code segment.  Public Delegate Sub _  CheckOrderFormEventHandler(ByVal e As EventArgs)  Private Shared ReadOnly CheckOrderFormKey As New Object（　）  public event CheckOrderFormEventHandler  Public Custom Event CheckOrderForm As CheckOrderFormEventHandler  AddHandler(ByVal value As CheckOrderFormEventHandler)  Events.[AddHandler](CheckOrderFormKey, value)  End AddHandler  | English | Chinese | Japan | Korean | - 21 - Test Information Co., Ltd. All rights reserved. RemoveHandler(ByVal value As CheckOrderFormEventHandler)  Events.[RemoveHandler](CheckOrderFormKey, value)  End RemoveHandler  RaiseEvent(ByVal e As EventArgs)  End RaiseEvent  End Event  You need to provide a method that enables the OrderForm control to raise the CheckOrderForm event.  Which code segment should you use?（）

A、

B、

C、

D、

  • B

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