单项选择题
You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application.
The application contains an ObservableCollection object named Pictures that contains several Picture objects.
Each Picture object contains the Name and PictureFilePath properties.
You add a ListBox control to the application.
You need to ensure that the pictures are displayed in the ListBox control.
Which code fragment should you use?（）
A.
B.
C.
D.
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You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You add a DataGrid named gridContacts that is data-bound to a collection of Contacts. Each item has the ContactName and Phone properties. The DataGrid contains a column named ContactNameColumn that is bound to ContactName. You write the following code fragment. You need to ensure that the application meets the following requirements: Phone number is shown as a row detail when the row is selected. Only ContactName can be edited. What should you do?（）
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