title: Where do I find System.Windows.Interactivity as redistributable?
body: <p>I tried downloading Blend 3 but even with that installed I can't find the file under .NET. 
  If I try to add a reference from C:\Program Files (x86)\Microsoft SDKs\Expression\Blend 3\Interactivity\Libraries\WPF and use this code <a href="http://pastebin.com/VdeRyPdv" rel="noreferrer">http://pastebin.com/VdeRyPdv</a> I get an error that the file was not found. It also adds a lot of folders like en, de es fr etc to my debug folder.</p>