单项选择题
A.Prior to installation，set the StartType property of the ServiceInstaller class.
B.Prior to installation，set the Account，Username，and Password properties of theServiceProcessInstaller class.
C.Use the CONFIG option of the net.exe command-line tool to install the service.
D.Use the installutil.exe command-line tool to install the service.
单项选择题 您最近向所有用户创建和部署使用.NET1.1CLR开发的应用程序，管理员更新所有用户的计算机并且安装了NET2.0CLR，运行初步测试并发现使用您创建的应用程序。网1.1CLR不兼容。NET2.0CLR。您需要确保可以与运行应用程序。网1.1CLR。你应该做什么？（）
单项选择题 You need to select a class that is optimized for key-based item retrieval from both small and large collections. Which class should you choose？（）
单项选择题 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？（）