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- 单项选择题 You are creating a Windows Forms application by using the .NET Framework 3.5. You create a new form in the application.You add a ContextMenuStrip control named dctxMenu to the form. You have a user defined class named CustomControl.You write the following code segment in the application （Line numbers are included for reference only ） CustomControl myControl = new CustomControl（）； You need to ensure that an instance of CustomControl is displayed on the form as a toplevel item of the ctxMenu control. Which code segment should you add？（）
A、A
B、B
C、C
D、D
- A
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