title: How to duplicate and rename an entire web application/solution/project in VS 2013?
body: <p>I thought this would be quite easy!  Maybe it is and I'm approaching it all wrong.</p>
  
  <p>I have a "base" web app that I'm starting with.  Let's call it solution/project abc.  It lives in inetpub/wwwroot/abc/ and that folder has the abc.sln, abc.suo and single project folder (also called abc) in there.</p>
  
  <p>I want to duplicate this entire folder, solution and project and call it xyz, so that I still have the existing abc solution/project but I also have xyz solution and project.</p>
  
  <p>So far I have created an empty web app called xyz.  I then copied/pasted the project folder abc from solution folder abc and renamed the folder "xyz" and the project file in there "xyz.vbproj".  I then "add existing project" to my xyz solution and all looks good.  I then edit properties and change namespaces to "xyz" from "abc".  I also change the logo and some header text from abclogo to xyzlogo.</p>
  
  <p>I then build the project and get my first problem: "The discovered startup type 'xyz.Startup, sustain, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' conflicts with the type 'abc.Startup"</p>
  
  <p>Also when I now try and build/run my existing abc solution/project, that now starts failing with errors relating to conflicting startup types, referring to "xyz.startup" but there is no reference or even occurence of "xyz" anywhere in my "abc" solution, so I have no idea why there is a conflict here. It's like there's some kind of link remaining.</p>
  
  <p>If I "build" my abc project and run it again, it works. If I switch to the other project and build/run it, it breaks my previously-working abc project.</p>