http://blogs.msdn.com/b/jackg/archive/2007/03/14/add-in-s-clr-and-vsta-confused-yet.aspxWe have gone through some naming changes with WinFX and .Net . And we have gone through a few on the MAF (Managed AddIn Framework), the WinFX AddIn model and System.AddIn. The previous are all terms we use to discuss the Add-In model in the broad senseen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.msdn.com/b/jackg/archive/2007/03/14/add-in-s-clr-and-vsta-confused-yet.aspx#7376370Fri, 01 Feb 2008 20:51:30 GMT91d46819-8472-40ad-a661-2c78acb4018c:7376370Jack Gudenkauf<p>ATS, The optional isolation boundary may be an AppDomain, or Process (and AppDomain's within).</p> <div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=7376370" width="1" height="1">http://blogs.msdn.com/b/jackg/archive/2007/03/14/add-in-s-clr-and-vsta-confused-yet.aspx#7343278Thu, 31 Jan 2008 10:00:17 GMT91d46819-8472-40ad-a661-2c78acb4018c:7343278ATS<p>I am not quite understand the boundary in your diagram. it means the add-in and host are in the same physical process and different appdomains; or in different physical processes.</p><div style="clear:both;"></div><img src="http://blogs.msdn.com/aggbug.aspx?PostID=7343278" width="1" height="1">http://blogs.msdn.com/b/jackg/archive/2007/03/14/add-in-s-clr-and-vsta-confused-yet.aspx#4432479Fri, 17 Aug 2007 20:14:47 GMT91d46819-8472-40ad-a661-2c78acb4018c:4432479Jack Gudenkauf (JackG) WebLog<p>Last year, I did a webcast when I was attending an SI (Solution/System Integrator) Architect conference</p> <img src="http://blogs.msdn.com/aggbug.aspx?PostID=4432479" width="1" height="1">