What Is The Classic .NET AppPool Folder Under Users In Windows 7???

Hello. I have a question. What is the Classic .NET AppPool folder that is found in the Users folder in Windows 7? It was just created earlier today by looking at Properties, many days after I installed Windows 7 -- so I assume it wasn't there right after I finished installing Windows 7. I have made many modifications to my Windows 7 lately, so I may of somehow created it without knowing that I did. So someone could tell me how I created it?

What does this folder do? It has inside it much of the same folders and files found inside other user type files, like my own user name file.

Now, do I need this folder? Can I eliminate it? Is there a way for me to get rid of it in the same manner on however I created it? Is it tied into some other feature or function that if I uninstalled, disabled, or removed it, I could get rid of this folder?

Please reply. Tell me about it. Do I need it and how does it work? Thank you!