单选题You are creating a Windows Forms application by using the .NET Framework 3.5. You plan to develop a new control for the application.The control will have the same properties as a TextBox control.You need to ensure that the control has a transparent background when it is painted on form.You want to achieve this goal by using the minimum amount of development effort.What should you do？（）ACreate a new class that is derived from the Control class.Call the SetStyle method in the constructor.BCreate a new class that is derived from theTextBox control class.Override the OnPaint method in the constructor.CCreate a new class that is derived from the Control class.Set the BackColor property of the control to Transparent.Call the SetStyle method in the constructor.DCreate a new class that is derived from theTextBox control class.Set the BackColor property of the control to Transparent in the constructor.Call the SetStyle method in the constructor.
单选题
You are creating a Windows Forms application by using the .NET Framework 3.5. You plan to develop a new control for the application.The control will have the same properties as a TextBox control.You need to ensure that the control has a transparent background when it is painted on form.You want to achieve this goal by using the minimum amount of development effort.What should you do？（）
A
Create a new class that is derived from the Control class.Call the SetStyle method in the constructor.
B
Create a new class that is derived from theTextBox control class.Override the OnPaint method in the constructor.
C
Create a new class that is derived from the Control class.Set the BackColor property of the control to Transparent.Call the SetStyle method in the constructor.
D
Create a new class that is derived from theTextBox control class.Set the BackColor property of the control to Transparent in the constructor.Call the SetStyle method in the constructor.
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