You create a Microsoft ASP.NET Web application by using the Microsoft .NET Framework version 3.5.  The Web site uses C# as the programming language. You plan to add a code file written in Microsoft VB.NET to the application. This code segment will not be converted to C#. You add the following code fragment to the Web.config file of the application.          You need to ensure that the following requirements are met：  ¡；¤The existing VB.NET file can be used in the Web application  ¡；¤The file can be modified and compiled at run time  What should you do？（）

• A、A
• B、B
• C、C
• D、D