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