Can we add code files of different languages in App_Code folder?

No. The code files must be in same language to be kept in App_code folder.

In ASP.NET, the App_Code folder is primarily used for storing source code files that are automatically compiled at runtime. These files typically contain classes, business logic, data access code, or other code components used by the web application.

As for your question, regarding adding code files of different languages in the App_Code folder, the correct answer would be:

No, the App_Code folder in ASP.NET is specifically designed to hold source code files written in languages that are compatible with the .NET Framework, such as C# or VB.NET. You cannot directly add code files of different languages, like Python or Java, into the App_Code folder. However, you can integrate components written in other languages via interoperability mechanisms like COM interop or by exposing functionality through web services or APIs.