多項選擇題

You are developing an application that receives events asynchronously.You create a WqlEventQuery instance to specify the events and event conditions to which the application must respond.You also create a ManagementEventWatcher instance to subscribe to events matching the query.You need to identify the other actions you must perform before the application can receive events asynchronously.Which two actions should you perform？（）

A.Start listening for events by calling the Start method of the ManagementEventWatcher.
B.Set up a listener for events by using the EventArrived event of the ManagementEventWatcher.
C.Use the WaitForNextEvent method of the ManagementEventWatcher to wait for the events.
D.Create an event handler class that has a method that receives an ObjectReadyEventArgs parameter.
E.Set up a listener for events by using the Stopped event of the ManagementEventWatcher.

你可能感興趣的試題

單項選擇題

要創(chuàng)建自定義的異常類，所以名為 ProductDoesNotExistException 的自定義的異常由用戶指定的產(chǎn)品不可用時，會在一個新的應(yīng)用程序中顯示消息。此自定義的異常類將采取產(chǎn)品 id 作為參數(shù)的構(gòu)造函數(shù)，并且公開此值通過產(chǎn)品 id。你現(xiàn)在是創(chuàng)建名為 UpdateProduct 的一種方法。此方法將用于生成和管理 ProductDoesNotExistException 異常，如果產(chǎn)品 id 變量中包含的值為 0。您需要確保適當(dāng)?shù)拇a使用 UpdateProduct 方法。你應(yīng)該做什么？（）

A.
B.
C.
D.

單項選擇題

You work as an application developer at Certkiller .com. Certkiller .com uses an application that calculates monthly payments based upon client input. You are currently debugging this application using the Microsoft Visual Studio 2005 IDE. The application contains the following code：
public double CalculateMonthlyPayment （Single rate， double principal） {
//Implementation code }
You have discovered that unexpected results are being returned by the application. You would like to pause execution and display a message box containing an error message in the event of a negative or zero rate value is Passed to the CalculateMonthlyPayment method.
You need to ensure that this only occurs during debugging mode. What should you do？（）

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