单项选择题
A. Set the Value property of the style setter to point to a static resource
B. Set the BasedOn property of the heading style to point to a static resource for the body text style
C. Set the Key property of the heading style to start with the name of the body text style
D. Set the TargetType property of the heading style to TextBlock
单项选择题 You are developing a Windows Presentation Foundation (WPF) application. All of the application styles are in the file name Themes.dll You have the followiing markup segment. BlueBackground is defined in a XAML file named BlueTheme.xaml. The XAML markup is compiled into the Themes.dll file. You need to ensure that the XAML file is referenced so that the application can apply the settings in the BlueBackground style.（）
单项选择题 You are developing a user control for Windows Presentation Foundation (WPF) application. The user control contains a button. Both the user control and the hosting control must receive the button click event. You need to ensure that the user control responsd to the button click event before hosting control responds to the event. What should you do ?（）
单项选择题 You are developing a Windows Presentation Foundation (WPF) application. You configure PresentationTraceSource to track errors in a bound TextBox control in the application. You need to choose the window that the Trace information is sent to Which Visual Studio window should you select ?（）