单项选择题 您已经创建了具有库存的存储系统，在接口中的应用，并且想要使 跟踪库存短缺和盈余的应用程序中的跟踪。 应用程序应该不，但是，如果没有短缺或盈余的跟踪库存水平存在。 此外，您不希望每次打开或关闭切换跟踪功能重新编译。 你应该做什么？()

单项选择题 You have recently created an application, and want to capture all debugging text messages generated by it. You would like these debugging messages to display on the command line. The application that you created contains the following code: Debug.WriteLine ("Start the processing"); Console.WriteLine ("Generated by Console.WriteLine"); Debug.WriteLine ("End the processing"); You need to ensure that you are able to capture all debugging messages to the command line. What should you do?（）

单项选择题 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?（）