title: Unable to create virtual directory
body: <p>I am working on a website which authenticates with Facebook, so that the user can sign in through his/her Facebook profile. I've seen similar questions like this one, but none that covers exactly my issue.</p>
  
  <p>To test this Facebook authentication locally, I figured that some hacks were needed. You see, Facebook only allows redirects to certain domains after the authentication process. For these domains, <code>localhost</code> is not an option.</p>
  
  <p>So I decided to do some research. I ended up changing my <code>hosts</code> file to point the domain <code>local.fablelane.com</code> to <code>127.0.0.1</code>. However, now it complains when I try to change the virtual directory in Visual Studio 2012.</p>
  
  <p>First, I see this dialog after changing it.</p>
  
  <p><img src="https://i.stack.imgur.com/3KNTX.png" alt="enter image description here"></p>
  
  <p>I then click Yes and end up with this dialog here.</p>
  
  <p><img src="https://i.stack.imgur.com/Lz0tV.png" alt="enter image description here"></p>
  
  <p>What do you suggest I try? How can I change my virtual directory? It is important that I find a way to do this either programmatically, through changing a file somewhere, or through the commandline. The reason for this is that I intend to make an automatic setup program that does this for me in the future.</p>