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?（）
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