title: effect of adding a existing project to solution
body: <p>I have two solutions. Let say <strong>Sol1</strong> and <strong>Sol2</strong>. <br>
  Now I want to add a project of Sol1 to Sol2. Sol2 is not modifying that project.
  <br>
  So is thr any harm in doing this. Can this effect <strong>Sol1</strong> in any way?</p>