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单项选择题 You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You write the following code fragment to bind a customer object to several controls in a window. You need to identify the source of the error. What should you do?（）

A、 Use a Trace object.

B、 Use a Debug object.

C、 Use the WPF Visualizer.

D、 Use a PresentationTraceSources object.

  • D

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