title: Does .net 4.5 work side by side with .net 4.0?
body: <p>I am interested in installing the .NET 4.5.</p>
  
  <p>But I have heard that it is an In-Place upgrade.</p>
  
  <p>Since the users at my company uses Windows XP. <a href="http://visualstudio.uservoice.com/forums/121579-visual-studio/suggestions/2723735-make-net-4-5-work-on-any-os-that-supports-4-0" rel="noreferrer">I can't release any client side apps that use .NET 4.5.</a></p>
  
  <p>I know I can target .net 4.0 when I code, but, if I install .net 4.5, is there risk of things working on my machine that will not work on a Windows XP machine (that only has .net 4.0)?</p>
  
  <p>(By the way, I looked but did not see this question asked.  If it has been asked, please point me to it and I will try to delete this one.)</p>