单项选择题
A. Create a template. Declare a VisualState element in the template.
B. Create a StoryBoard animation. Add an EventTrigger class to the Button control that begins the StoryBoard animation.
C. Create a ScaleTransform class. Bind the ScaleX and ScaleY properties of the Button control to the Background property by using a custom value converter.
D. Add a method named ChangeAppearance in the code-behind file. Subscribe the ChangeAppearance method to the MouseEnter event of the Button control.
单项选择题 You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You write the following code fragment. (Line numbers are included for reference only.) You need to ensure that both Button controls display the "Save" text. Which code fragment should you insert at line 06?（）
单项选择题 You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application that displays a high-resolution graphic image named Image1.jpg. You need to limit the width of the image to 200 pixels. You also need to preserve the aspect ratio of the image. Which code fragment should you use?（）
单项选择题 You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You write the following code fragment. (Line numbers are included for reference only.) You need to ensure that a video file begins to play only when a user clicks Play. Which code fragment should you insert at line 06?（）