單項(xiàng)選擇題

You are developing a custom-collection class.You need to create a method in your class. You need to ensure that the method you create in your class returns a type that is compatible with the Foreach statement.
Which criterion should the method meet？（）

A.The method must return a type of either IEnumerator or IEnumerable.
B.The method must return a type of IComparable.
C.The method must explicitly contain a collection.
D.The method must be the only iterator in the class.

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單項(xiàng)選擇題

最近，您已完成創(chuàng)建的應(yīng)用程序使用應(yīng)用程序配置文件。
此配置文件包含一段名為 EmployeeSection，其中包含雇員的元素。
您需要查看 EmployeeSection 元素的內(nèi)容。
您需要確保 EmployeeSection 元素輸出到控制臺(tái)及其內(nèi)容。
你應(yīng)該做什么？（）

A.
B.
C.
D.

單項(xiàng)選擇題

You need to identify a type that meets the following criteria：
Is always a number.
Is not greater than 65，535.
Which type should you choose？（）

A.System.UInt16
B.int
C.System.String
D.System.IntPtr

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You are developing a custom-collection class.You need to create a method in your class. You need to ensure that the method you create in your class returns a type that is compatible with the Foreach statement. Which criterion should the method meet？（）

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You need to identify a type that meets the following criteria： Is always a number. Is not greater than 65，535. Which type should you choose？（）

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You are developing a custom-collection class.You need to create a method in your class. You need to ensure that the method you create in your class returns a type that is compatible with the Foreach statement.
Which criterion should the method meet？（）

You need to identify a type that meets the following criteria：
Is always a number.
Is not greater than 65，535.
Which type should you choose？（）