Can you right-click on the folder in Solution Explorer and select "Exclude From Project"?

>Hi everybody,
>
>I made a copy of the project in a separate directory and after I somehow messed up I brought the copies back and renamed these directories to _Messed_Up under the project (solution) directory.
>
>However, they are now somehow included into the solution. How can I exclude the directories and all files from the solution?
>
>Thanks in advance.