You are developing a Windows Presentation Foundation (WPF) application for a travel reservation systemYou need to ensure that users can select a range of travel dates.What should you do ?（）

You use Microsoft Visual Studio 2010 and Microsoft . NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You create a WPF window in the application.  You add the following code segment to the application. public class ViewModel { public CollectionView Data { get; set; } }public class BusinessObject { public string Name { get; set; } }The DataContext property of the window is set to an instance of the ViewModel class.  The Data property of the ViewModel instance is initialized with a collection of BusinessObject objects. You add a TextBox control to the Window. You need to bind the Text property of the TextBox control to the Name property of the current item of the CollectionView of the DataContext object.  You also need to ensure that when a binding error occurs, the Text property of the TextBox control is set to N/A . Which binding expression should you use?（）

You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application that displays an image.You need to ensure that users can stretch and scale the image. Which control should you use?（）

You create a Windows client application by using Windows Presentation Foundation (WPF). The application contains the following code fragment. You need to assign lbDetails to use the detail data template when btnDetails is clicked. Which code segment should you write for the click event handler for btnDetails?（）

You use Microsoft .NET Framework 4 to create an application. The application performs resource-intensive calculations that consist of multiple layers of nested looping.The application will be deployed to servers that contain varying hardware configurations. You need to ensure that the application utilizes CPU resources on the server in the most efficient manner. You want to achieve this goal by using the minimum amount of code. What should you do?（）

You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You need to ensure that users can view content in a book-reading format that displays two pages at a time. Which control should you use?（）

You are developing a Windows Presentation Foundation (WPF) application.The application contains stylized body text and heading text. The heading text is a slight variation of the body text.You need to ensure that if the body text changes, the heading text automatically inherits those changes.What should you do ?（）

You are developing a Windows Presentation Foundation (WPF) applicationThe application is for commercial use and requires a valid license key to be entered. You create a project type of Class Library code to validate license keysYou need to ensure that the user enters a valid license key during installation of the software.Which deployment should reference the class library?（）

You are developing a Windows Presentation Foundation (WPF) application that displays opportunities from List<T.. class named Lead. The Lead class contains the properties Title and Revenue.You add a DataGrid control named dgQualifiedLeads to the MainWindow.xaml file. You set the ItemsSource property to Leads as follows.You need to ensure that CollectionViewSource is used to filter the list to display only Lead objects with revenue ...What should you do ?（）