Other similar but to my knowledge non-related questions:

- [A file or folder with the name '' already exists Visual Studio 2012](https://stackoverflow.com/questions/18402950/a-file-or-folder-with-the-name-already-exists-visual-studio-2012)

- [ATL simple object wizard - "Object Xxx already exists" error](https://stackoverflow.com/questions/636975/atl-simple-object-wizard-object-xxx-already-exists-error)

**The error:**  

I try to add a simple class 
[![enter image description here](https://i.stack.imgur.com/gno5W.png)](https://i.stack.imgur.com/gno5W.png)
 and then proceed to the wizard where I get the following Error][2](https://i.stack.imgur.com/UzyZj.png): 
[![enter image description here](https://i.stack.imgur.com/UzyZj.png)](https://i.stack.imgur.com/UzyZj.png)
"Object already exists".  

I can't add the class "MainGame" (and a few other names) to any project, not even if I create a new project  

**How to recreate said bug/error:**  

The error occured when I deleted a Release folder I'd accidentally copied over from a project in another solution. All now non-functional class names are derived from the object files within that Release folder.  

**Solution:**  

I have no solution.  

**My questions are:**  

Have anyone else had this or a similar issue?  

If so, have you solved it and what is your solution?  

I am open to all suggestions and while this 'bug' isn't making programming impossible it is quite annoying not being able to use frequently used class names.