I am running Visual Studio 2012 (administrator) in Windows 8. I am unable to add an existing folder using Solution Explorer. I also can’t drag the folder from File Explorer into the Solution Explorer. I get the invalid target drop icon.
The only way I know is to add the folders by Add – “New Folder” and creating the folders manually.
Why am I am having these issues?
Why is ‘Include in Project’ menu option missing?

“Include in Project” shows up for files only not folders. When files are includes, their folders get included.