http://msmvps.com/blogs/paulomorgado/archive/2008/02/03/typemock-insulator-4-2-beta-publicly-available.aspxTypeMock (now called) Insulator 4.2 Beta is publicly available. Check out the release notes . One of my favorite new features is the improved mock chaining. Take this class to be tested: public class TestedClass1 { public IDictionary &lt; string , objectenCommunityServer 2008.5 SP2 (Build: 40407.4157)http://msmvps.com/blogs/paulomorgado/archive/2008/02/03/typemock-insulator-4-2-beta-publicly-available.aspx#1500251Wed, 06 Feb 2008 23:56:43 GMTd67277c4-116b-43f1-b688-e9ef184ea916:1500251Eli Lopian’s Blog (TypeMock) » Blog Archive » Typemock Isolator - Beta - Better Community<p>Pingback from &nbsp;Eli Lopian&amp;#8217;s Blog (TypeMock) &nbsp;&amp;raquo; Blog Archive &nbsp; &amp;raquo; Typemock Isolator - Beta - Better Community</p> <img src="http://msmvps.com/aggbug.aspx?PostID=1500251" width="1" height="1">