單項(xiàng)選擇題

You are creating a Windows Forms application by using the .NET Framework 3.5.The application stores a list of part numbers in an integer based array as shown in the following code segment （Line numbers are included for reference only）

You need to use a LINQ to Objects query to perform the following tasks： - Obtain a list of duplicate part numbers：
（1）Order the list by part numbers
（2）Provide the part numbers and the total count of part numbers in the results
Which code segment should you insert？（）

A.A
B.B
C.C
D.D

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You are creating a Windows Forms application by using the .NET Framework 3.5. You have implemented the PrintPage event to send the page output to the printer.The users must select the printer and the page range before printing. You need to ensure that users can print the content of the form by clicking the button control.
Which code segment should you use？（）

A.A
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單項(xiàng)選擇題

You are creating a Windows Forms application for the design of circuit boards and electronic equipment. You use the .NET Framework 3.5 to create the application x that allows designers to preview designs before printing them.The previewed documents must meet the following requirements：
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Which code segment should you use？（）

A.A
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D.D