title: How to add folder for new projects in Visual Studio 2012
body: <p>In my solution, I want to add a folder to which I want to add new projects.  What is the procedure for doing this?</p>
  
  <p>I tried to create the folder from within Visual Studio, but it created a 'solution folder'.  I have now researched this and found it is an organisational cue, but only a virtual one, and a 'solution folder' is not reflected in the file system.</p>
  
  <p>I then created a directory in Windows explorer, and found that you could click a button in the Solution Explorer window that shows all files.  I right-clicked on this and selected Include in Project, making it visible, but when I right click on this folder, I don't have 'Add new project' as an option.  Additionally, this folder is part of the main solution project, instead of just being a folder in the solution (if that makes sense).  In any event, I can't drag 'n' drop a project into this folder in Solution Explorer, so that isn't the answer.</p>
  
  <p>Rationale:  I'm trying to work out how to use prism and want to store modules (which are contained in their own VS Projects in the solution) in a 'Modules' directory.</p>