You are developing a Windows Presentation Foundation (WPF) application. You need to use XAML to create a custom control that contains two Button controls. From which base class should you inherit? （）A、FrameworkElementB、UIElementC、UserControlD、Button
You are developing a Windows Presentation Foundation (WPF) application. You need to use XAML to create a custom control that contains two Button controls. From which base class should you inherit? （）
- A、 FrameworkElement
- B、 UIElement
- C、 UserControl
- D、 Button
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