http://blogs.msdn.com/yirutang/archive/2006/06/07/621125.aspxAfter being in Exchange for almost a year, I tend to forget the how to run Reflection.Emit that I was once so familiared with. Occasionally, I would receive emails from this blog asking how to emit this, how to emit that. Before, the solutions came directlyen-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.msdn.com/yirutang/archive/2006/06/07/621125.aspx#649308Wed, 28 Jun 2006 07:07:30 GMT91d46819-8472-40ad-a661-2c78acb4018c:649308antoshaThis line does not seem to be necessary: <br> <br>&gt;&gt; typeBuilder.MakeGenericType(typeof(List&lt;&gt;).GetGenericArguments()[0]); <br> <br>And this line misses &quot;.dll&quot; extension: <br> <br>&gt;&gt; asmbuild.Save(&quot;mytest&quot;);