ASP.NET - How to combine C# code with VB in the same web application

There are many cases where you might want to combine C# classes with VB classes in the same website / web application. To do so, the following steps need to be followed:

• Add sub-folders to your app_code folder - one for your C# code and a second for your VB code:
• Place your code files in the appropriate folders - C# in the 'csCode' folder; VB in the 'vbCode' folder.
• Add the lines shown below to your web.config (within the <compilation> tag)
• Run/compile as normal!