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- 搜題干
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單項選擇題
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?（）
A.
B.
C.
D.
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