title: MVC .NET How to add unit test project in for existing source code?
body: <p>I've already created MVC project (VS2008 .NET 3.5) 
  at first time VS2008 ask me 
  "Would you like to create Unit test project for this application ?" 
  I choose No.. </p>
  
  <p>Now I realize that it's growing more complex and TDD (test driven development) approach would have been better.</p>
  
  <p>but can't find out how to add a unit test project in my solution?</p>