试题详情
单项选择题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.

  • B

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