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單項選擇題

You are creating a Windows Forms Application by using the .NET Framework 3.5.You plan to design a new control that will be used on multiple forms in the app.You need to ensure that the control meets the following requirement:  
(1)It retrieves data from a MSSQL Server 2008 database instance.  
(2)It uses WPF classes to display data.  
(3)It uses user-customizable actions when the control is first painted on the form.   
What should you do?()

A.Create a new custom class for the control that is derived from the Control class.
B.Create a new custom class for the control that is derived from the UserControl class.
C.Create a new custom class for the control that is derived from the ContentControl class.
D.Create a new custom class for the control that is derived from the ContentPresenter class.

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