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單項選擇題

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.

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