title: What's the point of unloading project in Visual Studio?
body: <p>I'm reading a book about MVC ASP.NET, there are some hidden project setup that you can only modify by <code>'unload'</code> the whole first(then all the structure gone), then after clicking <code>'edit'</code>, change the xml tag value.</p>
  
  <p>That reminds me to ask: why we need to unload the project before we modify the config file? Can anybody tell me the meaning of unloading project? </p>
  
  <p>Why not just open the folder location and change by Notepad?</p>