单项选择题 You are developing a Windows Presentation Foundation (WPF) application. You are implementing a test strategy for the application. You need to ensure that the test class can repeat user input. From which base class should the test class inherit?（）

单项选择题 You are developing a Windows Presentation Foundation (WPF) application.You need to display HTML content from a Web page on the WPF form. What should you do?（）

单项选择题 You use Microsoft .NET Framework 4 to create a Windows application. You want to use the ClickOnce technology to deploy the application on computers that run Windows Vista with User Access Control (UAC) enabled. You need to ensure that the application can be installed in a secure manner. Which setting should you use in the application manifest?（）