YoucreateacustomcontrolnamedOrderForm.Youwritethefollowingcodesegment.publicdelegatevoidCheckOrderFormEventHandler(EventArgse);privatestaticreadonlyobjectCheckOrderFormKey=newobject();publiceventCheckOrderFormEventHandlerCheckOrderForm{add{Events.AddHandl
题目
YoucreateacustomcontrolnamedOrderForm.Youwritethefollowingcodesegment.publicdelegatevoidCheckOrderFormEventHandler(EventArgse);privatestaticreadonlyobjectCheckOrderFormKey=newobject();publiceventCheckOrderFormEventHandlerCheckOrderForm{add{Events.AddHandler(CheckOrderFormKey,value);}remove{Events.RemoveHandler(CheckOrderFormKey,value);}}YouneedtoprovideamethodthatenablestheOrderFormcontroltoraisetheCheckOrderFormevent.Whichcodesegmentshouldyouuse?（）
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